Used but in great condition this 49 piece wooden wood Haba master builder block System set is ready for a new owner. Blocks are in great condition. The box is a bit beat up. Rare item. You won’t find this one anywhere else! Designed by. Ines Fromelt. (There are actually 50 pieces. While doing this listing, I realized one had been stolen by my basset hound so the 50th piece has a couple of tooth marks in it - sigh.) Smoke-free home.