Good Riddles

Question: Two coins make 30 cents one of them isn't a nickel what are they?

Question: A box without hinges, key or lid, yet inside, gold treasure is hid. What am I?

Question: I run out of battery but never need to be changed what am I?

Question: Those who make this item, don't use it. Those who BUY this item, have no need for it. But those who USE this item, never see it. What is the item?

Question: What sport is not a sport