Build Stomper - motorized for exciting mechanical movement! This set comes with 118 K'NEX parts, primarily micro rods & connectors to build a motorized robot. And just as his name suggests, Stomper moves by jumping! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included. Standard K'NEX parts made in the U.S.A. Special components made in China. Packaged in the U.S.A.