Get ready for a whole new way to play with K'NEX with the K'NEX Marble Run with engine. This set includes 3 design templates with easy-to-assemble components for a fun building experience. Assemble one, then disassemble it to build another. Or get creative and design your own. Great for STEM learning and an educational toy that will help prepare your child for complex learning. Watch your marble race on the track with 4 different paths. Where will your marble end? This set includes over 350 K'NEX pieces to assemble your marble masterpiece. Use the motor for maximum mechanical pleasure. Suitable for ages 3 and up