AMENDMENT TO MERGER AGREEMENT

                  THIS AMENDMENT TO MERGER AGREEMENT ("Amendment") dated October
20,  1998,  by and among  DOLLAR  TREE  STORES,  INC.,  a  Virginia  corporation
("Parent"),  DOLLAR TREE WEST, INC., a California corporation and a wholly owned
subsidiary of Parent  ("Sub"),  and STEP AHEAD  INVESTMENTS,  INC., a California
corporation  ("Company").  The  capitalized  terms  used  herein  shall have the
meanings  given such terms in the Merger  Agreement  dated July 22,  1998 by and
among the parties hereto ("Agreement").
                              W I T N E S S E T H:
                  WHEREAS,  pursuant to the  Agreement,  if the Average  Closing
Price of Parent's  stock is less than $34 11/32 per share,  Parent can terminate
the Agreement  unless Company  elects to treat the Average  Closing Price as $34
11/32; and
                  WHEREAS,  the parties desire to modify the Agreement to extend
the time between the  determination of the Average Closing Price and the date of
the Company Shareholders Meeting to give the parties additional time to consider
the decisions described above; and
                  WHEREAS, the parties also desire to make certain other 
amendments described below; and
                  WHEREAS,  the  Boards  of  Directors  of  Parent  and Sub have
approved this Amendment in accordance with Section 13.3 of the Merger Agreement,
applicable law and the Articles of Incorporation  and By-laws of Parent and Sub;
and
                  WHEREAS,  the  Board  of  Directors  of the  Company  has  (i)
approved this Amendment in accordance  with the  requirements of Section 13.3 of
the Merger Agreement, the


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California  Code  and the  Articles  of  Incorporation  and the  By-laws  of the
Company,  (ii) directed the  Agreement,  as modified by the  Amendment,  and the
Merger to be submitted to, and recommended approval by, the Shareholders.
                  NOW,  THEREFORE,  in  consideration of the premises and of the
mutual  covenants and agreements set forth herein,  the parties hereby amend the
Agreement and agree as follows:
         1. Average Closing Price.  The definition of "Average Closing Price" 
shall be amended by restating the first sentence of Section 2.2(b) to read as 
follows:
         For the purposes of this calculation, each share of Parent Common Stock
         shall be valued at the arithmetic  average ("Average Closing Price") of
         the closing price per share of Parent Common Stock,  as reported on the
         Nasdaq  National  Market  System  ("Nasdaq")  for  each of the five (5)
         consecutive trading days ending with the sixth (6th) business day prior
         to the Date of the Company  Shareholders  Meeting  ("ACP  Determination
         Date").  The "Date of the Company  Shareholders  Meeting"  shall be the
         date for the Shareholders Meeting specified in the Company's definitive
         Proxy Statement when first delivered to the Shareholders.

         2. Fully Diluted  Company  Shares.  The  definition  of "Fully  Diluted
Company  Shares"  shall be amended by  restating  the last  sentence  of Section
2.1(a) to read as follows:
         "Fully  Diluted  Company  Shares" shall be calculated by adding (i) the
         total number of shares of Company  Common Stock issued and  outstanding
         as of the ACP  Determination  Date (including  Dissenting  Shares) plus
         (ii) the total number of shares of Company  Preferred  Stock issued and
         outstanding  as of the ACP  Determination  Date  (including  Dissenting
         Shares)  plus  (iii) the total  number of shares of  Company  Common or
         Preferred  Stock subject to Options (as defined in paragraph (e) below)
         outstanding  as of the ACP  Determination  Date (as  defined in Section
         2.2(b)).

         3.  Termination of Agreement.  Section 11.1(k) shall be restated in its
entirety as follows:
                           (k) if the  Average  Closing  Price is less  than $34
         11/32,  Parent may  terminate  the  Agreement  in  accordance  with the
         procedures set forth below:



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                                    (i) No later than 5:00 p.m. Sacramento time 
         on the third calendar day following the ACP Determination Date,  Parent
         may send a notice to Company  electing  to change the Average  Closing 
         Price to a final price of $34 11/32 or less (as  determined  by Parent 
         in its sole discretion) for all purposes of this Agreement (including 
         the determination of the Exchange Ratio). If this notice is not sent,
         the Average Closing Price shall be determined by Section  2.2(b),  this
         Agreement  shall  not be deemed  terminated  pursuant  to this  Section
         11.1(k), and the following provisions of this Section 11.1(k) shall not
         apply.

                                    (ii) If Parent sends the notice described in
         Section 11.1(k)(i)  above, Company  shall send a reply notice to Parent
         either accepting or rejecting  Parent's election to change the Average 
         Closing Price no later than 5:00 p.m. Sacramento time on the third 
         business day preceding  the Date of the  Company  Shareholders Meeting.
         If Company rejects Parent's election (or a reply notice is not sent),  
         this Agreement shall be deemed terminated by Parent pursuant to this 
         Section 11.1(k).  If Company  accepts  Parent's  election,  the Average
         Closing Price shall be the price specified by Parent in the notice 
         described in Section  11.1(k)(i)  above,  and this  Agreement shall not
         be  deemed terminated by Parent pursuant to this Section 11.1(k).

         4.  Indemnification  of  Directors  and  Officers of the  Company.  All
references to "Sub" in Section 6.16 shall be replaced with the phrase "Surviving
Corporation."
         5.  Miscellaneous.  The original  Agreement,  as amended hereby,  shall
remain  in  full  force  and  effect  and  embody  the  entire   agreement   and
understanding  of the parties hereto in respect of the subject matter  contained
herein and  therein in  conformity  with  Section  13.5 of the  Agreement.  This
Amendment  may be executed in two or more  counterparts,  each of which shall be
deemed an original and all of which together  shall  constitute one and the same
instrument,  and, when signed by all of the parties hereto, shall become legally
binding on such parties  effective as of the date set forth at the  beginning of
this Amendment.



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                  IN WITNESS WHEREOF,  the parties have executed or caused to be
executed this Agreement effective as of the day and year first above written.

                                            STEP AHEAD INVESTMENTS, INC.


                                            By: /s/ Gary Cino
                                                ---------------------------
                                                    Gary Cino
                                                    Chief Executive Officer


                                            DOLLAR TREE STORES, INC.


                                            By: /s/ H. Ray Compton
                                                ----------------------------
                                                    H. Ray Compton
                                                    Executive Vice President



                                            DOLLAR TREE WEST, INC.


                                            By: /s/ H. Ray Compton
                                                ----------------------------
                                                    H. Ray Compton
                                                    Executive Vice President




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