Power Booster SALE was $99.95Starts from the bottom, pound the ball up the track for it to go another power station it goes against gravity!. This is a wooden ball and track set using brick locking system for stability. Swing the hammer backwards to hit the ball up the tracks. All items in the Trix Track series can be combined to create a bigger set to make play more interesting and challenging. Total 42 pieces. Product size 32 x 64 x 30cm