Construct 10 out-of-this-world Alien Robot themed machines and learn about the physics of levers and linkages. Make a creepy slithering alien snake-bot model with rotating arms and articulating tailor build an alien insectoid-bot that crawls on 6 legs! Create an alien raptor model with wings that move up and down and assemble a grabber claw with a scissors mechanism. Make a bipedal alien robot model that walks on two legs. In addition, build models of a pumpjack, swinging device, hopping alien frog-bot, roving dino-bot with reciprocating arm, and rolling alien dragon-bot. A 48-page manual guides your model building and experiments with step-by-step illustrated instructions and a battery-powered motor box powers the models. Set includes: - 138 Pieces to make 10 Models - Instruction Manual Age: 6 Years + Item size: 25.5 x 28 x 6.5cm