Brightly colorful snap together spheres for fundamental construction, Kiddy Connects snap to each other on the top, bottom & sides in an easy clean up jar.Made pliable to resist cracking if stepped on.The Advanced Set includes additional shapes such as 180.dual180, 90 and 135 degree shapes.Open ended play is an important and encouraged type of play, for the child doesn't have a right or wrong way to build; no expectations or possibility of failure.