My GT kid spent several hours with this set in elementary school. He's now graduating from high school It's been in the air conditioned closet for some years, smoke-free, pet-free. Batteries not included. All original parts and an instruction booklet in perfect condition are included. Some projects include something that makes noise, a helicopter-like blade that launches and spins, and a light-up device.
Great for keeping kids engaged in critical thinking during the summer!