Back to Top
Special Price $19.50 Regular Price $26.00
Wedges were some of the first tools humans ever created! Today, these simple machines are found all around, from doorstops to our own front teeth. Diagrams and simple text explain how wedges work, while experiments allow readers test the machines for themselves. Move through the history of wedges, from hand axes to handsaws, in this fascinating title for beginning readers.
|Written by||Joanne Mattern|
|Fiction / Nonfiction||Nonfiction|
|Format||Reinforced Library Binding|
|Trim Size||6 1/2 x 9|
|Grades||1 - 2|