AH-MAY-ZING! My preschool aged daughter is into how things work so we bought her this for Christmas. She adores the sticky/squishy body parts and has learned all their names and knows how to assemble it without much help. My husband also loved it and had a great time refreshing himself on his anatomy course. What a great idea! The bones do have a bit of a hard time snapping and staying in place but it doesn't detract from the joy of the process. I think this could be enjoyed well into a childs school years!