Junk drawer engineering

Description:

Outlines twenty-five projects to test the reader's engineering skills that use materials commonly found in a junk drawer, including a marble roller coaster, egg catch device, and pasta bridge.

subjects: Science,  Engineering,  Experiments,  Juvenile literature,  Engineering, juvenile literature,  Science, experiments,  Science, experiments, juvenile literature,  Engineering -- Experiments -- Juvenile literature,  Science -- Experiments -- Juvenile literature