A few edits for 'telegraph' project (#593)
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@ -12,8 +12,8 @@ Build a telegraph between two @boardname@s to communicate with your friends!
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## Materials
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* @boardname@, battery holder and 2 AAA batteries
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* Crocodile clips
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* 2 @boardname@s, a battery holder, and 2 AAA batteries
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* 4 crocodile clips
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## Activities
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