This non-fiction book looks at the history of the wheel as a significant invention. Features of the Book – Phase 6 - Fluent. Suffixes featured in this book title are: -est.
The Log Roller Experiment: Early humans likely got the idea for the wheel by watching heavy logs roll down hills. Gather heavy books and several round pencils or dowels. Move the books across a table by sliding them. Then, place the pencils underneath the books and push again.