This unique active toy will allow your little one to design and construct original creations from their imagination. Techno Gears Marble Mania Extreme is a 325 piece marble run and gears set with a motorized gear until that automatically returns your marbles to the top of the run. The set includes everything your child will need to build hundreds of marble run designs. Use spinners, a funnel, pendulum, gears, channels, mills and shafts to build a marble track unlike any other. This set will inspire creativity, build confidence, challenge problem solving skills and will expand your child's knowledge of mechanics and engineering. Marble Mania Extreme is bilingual (English and Spanish) and it requires two AA batteries (not included).