Car crash tests are conducted to ensure vehicles' safety. This kind of destructive testing is an important part of a vehicle design and engineering. Your young engineers can try to crash test a vehicle in their own home science lab. Crash Test Lab Engineering Toy from SmartLab brings a testing vehicle and a special dummy figurine, Jack. An enclosed Crash Cart has a removable roll cage, 2 types of bumpers and a safety harness. The dummy has with an electronic sensor that measures the force of the impact. Crash! Launch! Test! Change design! Test again! Customize the crash test car and don't worry about crashing Jack again and again. The science toy from Educational Toys Planet comes complete with an activity booklet that tells children about laws of motion, principles of physics and engineering. The crash test dummy requires 2 AAA batteries (not included).