With Skeleflex Sets, interchangeable pieces allow for endless play. Kids can create something unique every time they build. Flex joints can be incorporated into any attachment point for lifelike movement. Building set includes an idea booklet with examples of different creatures that can be built. Look for dino bones and a free creature poster inside. All pieces can be used with all Skeleflex sets to build hundreds of creatures. Comes in 8.5" x 5" storage case. 28 pieces.