Kids First Engineering DesignThames & Kosmos Kids First Engineering Design Speed, power, catapults, and collisions! Physics and engineering are full of action! Kids will have the 20 models in this introductory kit racing, rolling, flying, falling, crashing, balancing, and spinning around in 22 action packed science experiments. After following step by step illustrated instructions to build each model which include a tightrope walker, elevator, crane, windmill, and all wheel drive