This little robot is tough! Run by a single motor, he walks with a decidedly "angry" pace -- and if he falls over, he picks himself up again! An awesome design with an amazing gear mechanism, he will not quit! Over 50,000 sold in Japan and a big hit at the International Robot Exhibition. Easy to build.
 
Product Dimensions:11.25 x 8.75 x 2.6 inches
Shipping Weight: 13.25 
Manufacturer recommended age: ages 6 and up