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  • Gebundenes Buch

The children learn about the history of roads and railroads, what can be a problem, and what may not be serious. They learn about engines and traction. They learn about moving people and things around with less work and cost. They run tests of their own to see how traction and friction work. They learn about improvising and going with what they have.

Produktbeschreibung
The children learn about the history of roads and railroads, what can be a problem, and what may not be serious. They learn about engines and traction. They learn about moving people and things around with less work and cost. They run tests of their own to see how traction and friction work. They learn about improvising and going with what they have.