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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   SCHEDULE TO

          Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of
                       the Securities Exchange Act of 1934
                               (Amendment No. 13)

                              NET PERCEPTIONS, INC.
                       (Name of Subject Company (Issuer))

                           OBSIDIAN ENTERPRISES, INC.
                       (Names of Filing Person (Offeror))

                    COMMON STOCK, PAR VALUE $.0001 PER SHARE
                         (Title of Class of Securities)
                            ________________________
                                   64107 U 101
                      (CUSIP Number of Class of Securities)

                                Timothy S. Durham
                             Chief Executive Officer
                           Obsidian Enterprises, Inc.
                         111 Monument Circle, Suite 4800
                           Indianapolis, Indiana 46204
                            Telephone: (317) 237-4055
            (Name, Address and Telephone Numbers of Person Authorized
       to Receive Notices and Communications on Behalf of Filing Persons)

                                   Copies to:
                             Stephen J. Dutton, Esq.
                               Barnes & Thornburg
                            11 South Meridian Street
                           Indianapolis, Indiana 46204
                            Telephone: (317) 236-1313



                            CALCULATION OF FILING FEE

--------------------------------------------------------------------------------
              Transaction Valuation*               Amount of Filing Fee**
--------------------------------------------------------------------------------
                    $11,206,411                            $906.60
--------------------------------------------------------------------------------

*    Estimated  for  purposes  of  calculating  the  amount of filing  fee only.
     Transaction  value derived by multiplying  28,734,388 (the number of shares
     of common stock of the subject company  outstanding as of October 31, 2003)
     by $.39 (the  value of each share of subject  company  as of  December  12,
     2003).

**   The amount of the filing fee,  calculated in  accordance  with Rule 0-11 of
     the  Securities  and Exchange Act of 1934, as amended,  and Fee Advisory #6
     for Fiscal Year 2004 issued by the  Securities  and Exchange  Commission on
     November 24, 2003, equals 0.00008090% of the transaction valuation.

[X]  Check  the  box if any  part  of the  fee is  offset  as  provided  by Rule
     0-11(a)(2)  and  identify  the  filing  with which the  offsetting  fee was
     previously  paid.  Identify the previous filing by  registration  statement
     number, or the Form or Schedule and the date of its filing.

 Amount Previously Paid:  $906.60       Filing Party: Obsidian Enterprises, Inc.
 Form or Registration No.: Form S-4     Date Filed: December 15, 2003

[_]  Check the box if the filing relates  solely to  preliminary  communications
     made before the commencement of a tender offer:

Check the  appropriate  boxes below to designate any  transactions  to which the
statement relates:

[X]  third-party tender offer subject to Rule 14d-1.

[_]  issuer tender offer subject to Rule 13e-4.

[_]  going-private transaction subject to Rule 13e-3.

[_]  amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer:



This  Amendment  No. 13 amends and  supplements  the Tender  Offer  Statement on
Schedule TO originally  filed with the Securities and Exchange  Commission  (the
"Commission") on December 15, 2003, as amended and supplemented by the following
amendments (as amended and supplemented, this "Schedule TO"):

     o    Amendment No. 1 filed with the Commission on December 17, 2003;

     o    Amendment No. 2 filed with the Commission on December 23, 2003;

     o    Amendment No. 3 filed with the Commission on January 21, 2004;

     o    Amendment No. 4 filed with the Commission on February 17, 2004;

     o    Amendment No. 5 filed with the Commission on February 20, 2004;

     o    Amendment No. 6 filed with the Commission on February 27, 2004;

     o    Amendment No. 7 filed with the Commission on March 5, 2004;

     o    Amendment No. 8 filed with the Commission on March 9, 2004;

     o    Amendment No. 9 filed with the Commission on March 11, 2004;

     o    Amendment No. 10 filed with the Commission on March 11, 2004;

     o    Amendment No. 11 filed with the Commission on March 18, 2004; and

     o    Amendment No. 12 filed with the Commission on March 29, 2004.

This  Schedule TO relates to the offer (the  "Offer")  by Obsidian  Enterprises,
Inc.,  a  Delaware  corporation  ("Obsidian"),   to  exchange  each  issued  and
outstanding  share of  common  stock,  par  value  $.0001  per  share  (the "Net
Perceptions  Shares"),  of Net Perceptions,  Inc., a Delaware  corporation ("Net
Perceptions"),  for  3/100 of a share of  common  stock,  par  value  $.0001  of
Obsidian  ("Obsidian Shares") and $0.25 per share in cash. In lieu of fractional
shares,  cash will be provided in an amount equal to the value of the fractional
share.

Obsidian has filed a  registration  statement  with the  Commission  on Form S-4
(Reg.  No.  333-111191)  relating  to  the  Obsidian  Shares  to  be  issued  to
stockholders  of Net  Perceptions  in the Offer (as amended,  the  "Registration
Statement").  The  terms  and  conditions  of the  Offer  are set  forth  in the
prospectus which is a part of the Registration  Statement (the "Prospectus") and
the related Letter of Transmittal.  Obsidian has filed the following  amendments
to the Registration Statement:

     o    Amendment No. 1 filed with the Commission on December 17, 2003;

     o    Amendment No. 2 filed with the Commission on March 11, 2004; and

     o    Amendment No. 3 filed with the Commission on March 29, 2004.

On March  30,  2004,  Obsidian  issued  a press  release  announcing  that it is
extending the exchange offer to 5:00 p.m.,  New York City time,  April 14, 2004.
The exchange offer was previously scheduled to expire on April 7, 2004.

A copy of the March 30, 2004 press  release is  incorporated  by reference  into
this Schedule TO.

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ITEM 12.   EXHIBITS.

(a)(5)(xi)     Text of press release issued by Obsidian dated March 30, 2004.

                                       3



                                   SIGNATURES



     After due inquiry  and to the best of my  knowledge  and belief,  I certify
that the  information set forth in this Amendment No. 13 to Schedule TO is true,
complete and correct.

                                          OBSIDIAN ENTERPRISES, INC.

                                          By:  /s/ Timothy S. Durham
                                             --------------------------
                                                Timothy S. Durham
                                                Chief Executive Officer


Date:   March 30, 2004

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                                                              Exhibit (a)(5)(xi)

FOR IMMEDIATE RELEASE
MARCH 30, 2004

OBSIDIAN ENTERPRISES (OTCBB: OBDE) ANNOUNCES EXTENSION OF EXCHANGE OFFER FOR NET
PERCEPTIONS (NASDAQ: NETP)

INDIANAPOLIS,  March 30, 2004 -- Obsidian  Enterprises,  Inc.  (OTCBB:  OBDE), a
holding  company  headquartered  in  Indianapolis,  announced  today that it has
extended its exchange offer for shares of Net Perceptions' (Nasdaq: NETP) common
stock until 5:00 p.m., New York City time, on Wednesday, April 14, 2004.

In the exchange  offer,  which was  commenced  December  15,  2004,  Obsidian is
offering Net Perceptions  shareholders  the  opportunity to receive  twenty-five
cents  ($0.25)  per  share in cash and  three  one-hundredths  (3/100)  share of
Obsidian common stock for each share of Net Perceptions  common stock.  Obsidian
currently does not own any of the  outstanding  shares of Net  Perceptions.  The
offer was  scheduled  to expire at 5:00 p.m.,  New York City  time,  on April 7,
2004.  As of the close of  business  on March  26,  2004,  based on  information
received from the exchange agent, approximately 1,010,608 Net Perceptions shares
had been deposited.

In connection with the extension,  Obsidian announced that two conditions to the
exchange offer,  that Net Perceptions not take further action in connection with
its proposed plan of liquidation  and that the Blakstad class action  litigation
be resolved to Obsidian's  reasonable  satisfaction,  have been  removed.  Other
terms and conditions of the exchange offer remain unchanged.

The offer is subject to certain conditions, including that:

     o    Net Perceptions takes  appropriate  action to cause its poison pill to
          not be applicable to the offer;

     o    Obsidian  be  satisfied  that  Section  203  of the  Delaware  General
          Corporation Law will not be applicable to the contemplated second-step
          merger; and

     o    stockholders  tender at least 51% of the outstanding  shares of common
          stock of Net Perceptions.

Obsidian filed a Registration Statement on Form S-4 and a Tender Offer Statement
related to the current  offer with the  Securities  and Exchange  Commission  on
December  15,  2003 and filed its most  recent  amendments  to each on March 29,
2004.

The Exchange Agent for the exchange offer is StockTrans, Inc., 44 West Lancaster
Avenue,  Ardmore,  Pennsylvania  19003.  The Information  Agent for the exchange
offer is Innisfree M&A Incorporated,  501 Madison Avenue,  20th Floor, New York,
New York 10022. You may contact Innisfree M&A,  toll-free,  at (888) 750-5834 if
you have additional questions about the proposed transaction.

Obsidian  is a  holding  company  headquartered  in  Indianapolis,  Indiana.  It
conducts  business  through its  subsidiaries:  Pyramid  Coach,  Inc., a leading
provider of corporate and celebrity  entertainer coach leases;  United Trailers,
Inc., and its division, Southwest Trailers, manufacturers of steel-framed cargo,
racing ATV and specialty trailers; U.S. Rubber Reclaiming,  Inc., a butyl-


                                       5


rubber  reclaiming  operation;  and Danzer  Industries,  Inc., a manufacturer of
service and utility truck bodies and steel-framed cargo trailers.

THIS PRESS RELEASE IS PROVIDED FOR INFORMATIONAL PURPOSES ONLY AND IS NEITHER AN
OFFER  TO  PURCHASE  NOR A  SOLICITATION  OF AN  OFFER  TO  SELL  SHARES  OF NET
PERCEPTIONS,  INC. OR OBSIDIAN ENTERPRISES,  INC. OBSIDIAN ENTERPRISES HAS FILED
WITH THE  SECURITIES  AND  EXCHANGE  COMMISSION  A  REGISTRATION  STATEMENT  AND
EXCHANGE OFFER DOCUMENTS WITH RESPECT TO THE PROPOSED TRANSACTION. INVESTORS AND
SECURITY  HOLDERS  ARE  ADVISED TO READ THOSE  DOCUMENTS  BECAUSE  THEY  INCLUDE
IMPORTANT INFORMATION.  INVESTORS AND SECURITY HOLDERS MAY OBTAIN A FREE COPY OF
ANY DOCUMENTS FILED BY OBSIDIAN ENTERPRISES WITH THE SEC AT THE SEC'S WEBSITE AT
WWW.SEC.GOV.  The  registration  statement and exchange offer  documents and the
other  documents  may also be obtained  free of charge by directing a request by
mail to Innisfree M&A  Incorporated,  501 Madison Avenue,  20th Floor, New York,
New York 10022, or by calling toll-free (888) 750-5834, and may also be obtained
from  Obsidian  Enterprises,  Inc.  by  directing  a request by mail to Obsidian
Enterprises, Inc. 111 Monument Circle, Suite 4800, Indianapolis,  Indiana 46024,
Attn: Rick D. Snow.

This press release contains "forward-looking  statements." These forward-looking
statements are based on currently available competitive,  financial and economic
data and  management's  views and  assumptions  regarding  future  events.  Such
forward-looking statements are inherently uncertain. Obsidian Enterprises cannot
provide  assurances that the exchange offer described in this press release will
be successfully  completed or that we will realize the  anticipated  benefits of
any transaction.  Actual results may differ materially from those projected as a
result of certain risks and uncertainties,  including but not limited to: global
economic and market conditions; the availability of liquidity under our existing
lines of  credit;  successful  integration  of  acquired  or merged  businesses;
changes in interest  rates;  our ability to retain key management and employees;
our ability to meet demand at  competitive  prices in our coach leasing  segment
and our trailer and related transportation  equipment manufacturing segment; our
ability to  successfully  develop  alternative  sources of raw  materials in our
butyl rubber reclaiming segment;  relationships with significant  customers;  as
well as other  risks  and  uncertainties,  including  but not  limited  to those
detailed  from time to time in Obsidian  Enterprises's  Securities  and Exchange
Commission filings.

Source: Obsidian Enterprises, Inc.

For More Information Contact:
Timothy S. Durham
Chairman & C.E.O.
Obsidian Enterprises, Inc.
tsdurham@msn.com
317-237-4055