(Bellwether Media Jan. 1, 2016)
Screws are simple machines used for many different jobs. The concept of a screw is used in snow blowers, drills, and presses. Kids will learn how screws work and how they are used in complex machines.
- Simple Machines: Blastoff Readers, Level 4
- 1626174784 / 9781626174788
- 1.6 oz.
- 6.1 x 0.2