This a quick blog pertaining to how I made a puzzle board. The materials are a 1/2 sheet of cherry cabinet grade 1/4" ply...well, the stuff with the mdf core. And some 4/4 walnut.
I believe the sheet was cut down to two 24x36" pieces. I ripped some walnut 3/4" x 1" for dividers. Thus the space for the drawers will be 1"tall. In the picture below I'm gluing (weighting) the dividers in place. Precision is a must, otherwise you'll have wonky sliding drawers.