When you launch a marble into one of these holes, the slot spins. If three of the same icon match up, that icon appears in the slot. It can be a silver, gold, or other color coin. A silver coin gives you 5,000 points. A gold coin gives you 10,000 points. The other coin gives you 50,000 points. It can also be a timer that sends marbles back a little bit (very convenient), or a detonator. Then again, there is always the chance that you will not get anything. It only appears in Quest mode.