Introduce STEM concepts to your child with a K'nex Education STEM explorations roller coaster building set. This ingenious set makes learning fun and sees kids building a working roller coaster while learning to understand science, engineering, art, and math concepts. With over 500 parts, this set is perfect for industrious kids who love to learn while playing. | K’NEX Education STEM Explorations Roller Coaster Building Set - 546 Pieces (77078)