they tech numbers and letters , some also have vehicles (Alyssa loves the air plane one) or animals . She has about 40 blocks so far and the wagon playset and the farm that plays Old McDonald
ive looked on Ebay and found the really big Incrediblock that holds a bunch of them and tells you what is inside . I also bid on a dragon that goes with the Peek-A-Balls , the only reason i bid on those on Ebay is because you cant buy them any more in stores they are from 2002 of some time around that .Ive noticed that the blocks on Ebay are the same price if not more than the store and once you add the exorbited 20 dollar shipping i could have bought 2 sets