. Launch a rocket with air and water power . Build a soda bottle submarine . Make an insect-droid with wire legs . Explore eco-friendly solar power and more. Unplug and become a super engineer and learn the science behind each project. Building your own stuff is inspiring for the budding engineers of the future. With hands-on fun learning, using high interest, brightly presented photographs of the finished result for guidance, it's a cool way to spend time.