Being a Dad, I'm often confronted with this challenge: is the TV on downstairs? You never know! You might have to stop what you're doing, march downstairs, and actually look to see if the electronic item in question is actually increasing your power bill.
My sweet children, however, have found a way to save me all those steps. Here's my new "Tell-Me-If-My-Downstairs-TV-Is-On-Inator":
Yup, looks like it's on.