Children love creating their own special ball tracks. The Masterkidz Kinetic Ball Trax system is the ultimate ball track with which children can construct paths and tracks with direction changers and other motion gears. It is the ultimate STEM toy for children to learn and enjoy. The ball track system can be played with on a table, the floor, and more importantly, on the Masterkidz STEM Wall. Children can also build a ball track on the STEM Wall extending to a table or the floor. 209 piece set in 5 translucent colours. Note: images shown are a combination of the 120 and 209 piece pack. Ages 3yrs+.