What The ...?
Alright, if anyone thinks this would be a great gift for my kids - No.
from the MindWare catalog - shop at your own freakin' risk (Aaaaargh!)
Encourage Engineers in Your Own Backyard
Jump-start some healthy (and safe!) youthful experimentation around the laws of science, math and even thermodynamics with this step-by-step guide. Detailed diagrams and photos 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. 274 pages.
Ages 11 to adult (Close adult supervision recommended)