12164 Features: -Set comes with 120 K"NEX parts, primarily micro rods and connectors to build a motorized robot.-Combines with ace for a combo build (each set sold separately).-3 of 4 in robo battlers series.-Flash moves with lightning quickness on wheels.-Requires 2 "AA" batteries, not included.-Standard K"NEX parts made in the U.S.A.-Ages 7+.-Not for children under 3 years old. Disclaimer: -Warning: Choking hazard. Small parts..