Doudna Kelly Books
Books di Doudna Kelly editi da Mighty Media
The Kids' Book of Simple Machines
Doudna Kelly
edizioni Mighty Media collana Mighty Media (Paperback)
Wheel and axle, wedge, and screw. Lever and pulley and inclined plane, too! Learning about the six simple machines has never been more fun! Through exciting science projects and activities kids can easily do at home or school, tomorrow’s scientists and engineers will have a blast learning about simple machines and...