This design provides parts for building small structures. I used it to build a knife holder for my japanese kitchen knifes that don't fit in standard knife blocks. Requires glue to keep the structure together. Any 3mm thick material can be used. To make it in plywood in the UK, the cost of making was $31 and the materials was $2 (P1 181mm x 181mm sheet). Parts could be used to make a lamp, pencil holder, or other similar structures.