Experience the power of gravity with the STEM-inspired track system GraviTrax! Use your imagination and building skills to make superb tracks and set the gravity spheres rolling. Raise your track to new heights! Press the lever as a marble enters the Lifter at the bottom to release the marble at the top. Combine this add on pack with the starter-set and expansion pieces for marble inspired fun! This set is suitable for 1+ players, ages 8 years and up. Includes 1x Lift, 7x Gravity Spheres, 1x Clear Level, 8x Large Vertical Tiles, 4x Small Vertical Tiles, 1x Long Rail, 2x Medium Rails, 3x Short Rails.