The amazingly realistic skeleton model is literally a snap to assemble, and it's fully articulated. Too; it bends in all the right places. The accompanying booklet is a model of science writing, starting with the lead: "Imagine yourself with no bones at all...You'd be a big pulsating blob..." Topics covered, in addition to bones, include the bodily systems, and even an introduction to evolution. The entire ensemble comes in a domed display jar perfect for housing the skeleton, once assembled.