Jump-start some healthy (and safe!) youthful experimentation around the laws of science, math and even thermodynamics with this step-by-step guide. Backyard Ballistics has detailed diagrams and photos that show how to build tennis ball mortars, potato cannons and more. A great way to get kids excited about engineering, physics and chemistry. Strong emphasis on safety from an engineering professor who includes engaging facts and inventor profiles. We recommend that parents work with or closely supervise their children when operating Backyard Ballistics devices. 169 pages.
Age Recommendation: Ages 12 and up