Switch On,Switch Off

$5.99

Let’s Read and Find Out Science
Melvin Berger
– Why does the light go on when you flip up the light switch? Did you know that electricity must flow back to its starting point in order to work? Find out how it works in this easy-to-understand book.

Description

Let’s Read and Find Out Science
Melvin Berger
– Why does the light go on when you flip up the light switch? Did you know that electricity must flow back to its starting point in order to work? Find out how it works in this easy-to-understand book.

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