Hebel verringern die Last: Einfache Maschinen für Kinder (Bilderbuch Wissenschaft)
18,81 €
A lever is one of six simple machines that are designed to make different kinds of work easier. Lifting, pulling, pushing--all these tasks are more efficient when you use a simple machine. In Levers Lessen the Load: Simple Machines for Kids, readers ages 5 to 8 learn how levers and fulcrums can help us move far more weight than we can on our own.
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