Derivable...This is a super cool Bowling Alley! When you add the rest of the set you have a funky-licious place to play. To use click on a bowling ball. You get two-three tries. Click in order..red ball, pink ball then blue ball. Three lanes to play in the forth is just to look at. You even have a shack to sell shoes! Laser lights fly around as you play. WOOT!