Pub Date 01 May 2018
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What is your favorite machine?
In My Favorite Machine: Concrete Mixers, young readers will learn all about concrete mixers. This book introduces kids to the different concrete mixers and the process used for making and transporting concrete.
Cement mixed with sand or gravel and water makes concrete.
These things are put into a drum that spins.
The drum never stops spinning. If it did, the concrete would dry.