The first game I ever played was the original Super Mario Bros. While nothing in that game really made sense in the real world, I always wondered why gold coins were being kept in giant boxes with question marks on them, and why hitting the box caused said coins to eject one-by-one. Well now that doesn’t seem quite so strange, as you can have your very own coin-producing block.
One game-lover decided that it was high time someone other than Mario and Luigi got to hit blocks for coins, and crafted his own. The end result was a cardboard box that, when elevated slightly, would shoot out a coin. It even makes the same sound that you would hear in the game. The best part is that the creator documented his work, and put it up on Instructables so that you can make your own.
https://www.youtube.com/watch?v=T5yEQWhpZiI