An in-depth exploration of three simple machines people commonly use to move a heavy load, with humorous language that’s especially appealing to older children. As they follow the processes of lifting lions (with a lever), pulling pandas on a pallet (with a wheel and axle), and delivering a big basket of bananas to a baboon birthday party (with a pulley), children gain a working knowledge of the forces that allow these simple machines to work. Glossary. Paperback, 32 pages. Ages 6 - 12.