219:-
Tillfälligt slut online – klicka på "Bevaka" för att få ett mejl så fort varan går att köpa igen.
An exploration of pulleys and gears and how they work. It is part of a series which examines everyday and high-tech uses of technology in machines with which children will be familiar. It features a mixture of practical and mental activities to reinforce learning.
- Format: Inbunden
- ISBN: 9780431017433
- Antal sidor: 32