From the mailbag:
"Dear Mama Bear,
My 7 year old learned all about safety outside regarding wires and stuff like that.
Being a curious kid, he then asked, if wires carry electricity, why can birds stand on them?
Do you know?
Love the fact your kid asks questions like this! It's really neat.
The answer is actually pretty simple – to get electrocuted, you need to "complete the circuit"; ie, provide a way for electricity to enter and exit.
Birds are only touching one wire, hence, they're safe.
Here's some more explanations:
Here's what happens when you *do* complete the circuit…
Hope that helps you explain it to your child!