Make a creepy slithering alien snake-bot model with rotating arms and articulating tail. Build an alien insectoid-bot that crawls on six legs. Create an alien raptor model with wings that move up and down. Assemble a cool 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 40-page manual guides your model building and experiments with step-by-step illustrated instructions.Details:Construct 10 cool machinesLearn about the physics of levers and linkagesFor ages 6 and upContents:138 pieces10 models40-page full-color manual