Collect & Build all three motorized robots in the Robo-Creatures Series - Robo-Sting, Robo-Smash, and Robo-Strike Each set boasts over 150 KNEX parts, primarily rods & connectors, And the motor allows for unique and exciting mechanical movement similar to the movements of the creatures they are mimicRobo-Stings wings flap like a hornet, Robo-Smash jumps like a primate, and Robo-Strike stings like a scorpion And thats not all - combine all three sets to create the ultimate creature Recommended for builders ages 7+, All sets require 2 AA batteries, not included, Each set sold separately, , Brand - KNEX Collect & Build, No of Batteries - 6, Batteries Replaceable - 1, Batteries Required - 1, Battery Type - AA, Age - 7+, Pieces - 476 total; 156+ in each set, Dimension - 9 X 2 X 9 in, , Item Weight - 0, 7 lbs, , Package Type - Colored Box, SKU: KNX233