Play Washers - Build a Set of Washer Boxes

By Chris Baylor, About.com Guide

Once the ends are attached to each box assembly, add some strength to the assembly by attaching one of the two remaining 9" pieces of stock directly in the center of each box.

TIP: Be certain that the cross piece is centered down the length of the box assembly, so that the holes in the top (to be cut later) do not interfere with the cross member.