168pcs Marble Building Blocks toy Improve Operational and Creative Ability: This STEM marble run set comes with an assembly instruction to help kids’ hand-eye coordination, and also helps your children improves creative thinking and problem solving ability. After they learned, they will have ability to build any different tracks by their imagination and logical mind. This is very important for children's future learning and growth. High Quality & Multiple Assembly Methods: This child building blocks toys set adopts high quality plastic material, which is durable, sturdy, safe and easy to assemble.