My seven year old is now collecting chess sets. I have a bunch of BNC connectors laying around. So here is a BNC chess set. There are two versions of the pawn.
Update: added a mock bnc connector for those who are connector deprived. It is not dimensionally correct, nor functional, but it should work as a replacement in this chess set. You probably only need it in the knight, pawn and bishop pieces.
My blog if you are interested.
Print the appropriate number of chess pieces.
Drill the holes out to fit your connectors.
Insert BNC's into plastic pieces.
Lather, rinse, repeat.