<ul><li>170 Pcs premium marble run set with transparent parts, endless fun for your child to watch marbles run along tracks.</li><li>Premium quality set! Package includes 120 pieces variety color action parts which are made of high quality solid color plastic and 50 regular size glass marbles</li><li>All tracks are easy to stick together and the set is stable once build up with our professional designed molds</li><li>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. Excellent Gifts for all kids</li><li>CHILD SAFETY: Meet US Safety Standard, Safety Test Approved, 100% Non-Toxic</li></ul><br><br>

JOYIN 170Pcs Glowing Marble Run, Construction Building Blocks Toys with 5 Glow in The Dark Glass Marbles, STEM Educational Building Block Toy(120 Plastic Pieces + 50 Glass Marbles)