Assemble your own marble runs with this excitingly challenging construction set. Reproduce the layouts pictured on the box or have fun experimenting with new designs. Interlocking chutes, bridges, pillars, and spinning wheels can all be combined in countless configurations that guarantee hours of great fun 45 pieces in bright solid colours, marble run promotes creativity and logical reasoning both of which are required to place and fix the components precisely and get the marbles rolling. All pieces are made of high-quality materials Manufacturers recommended age 4+, They are unbreakable and durable and allow you to build solid and precise structures that will amaze everyone This STEM marble run set comes with an assembly instruction to help kids’ hand-eye coordination. After they learned, they will have ability to build any different tracks by their imagination and logical mind. Perfect Toy Set to develop kids’ creativity, logical thinking, hand-eye coordination. Play and Gain patient and problem-solving ability