I made a thief-proof coin 'jar'
From an old shoe box. The lid had a big slot cut out in the middle and was selotaped to the box. The twist was me extending a jumbo paperclip to form a long piece of wire, attaching either end to a large battery (which was also selotaped to the box) and then having the wire run right across the slot. The result being that anyone (or myself for that matter) attempted to put their hand through the slot to take the monies the extremely hot wire would burn their hand.

I don’t know why I didn’t just make the coin slot too small to fit a hand through, like they usually tend to be. I was 8, fuck off.
(TheManWithThePlan cussed your mum on, Thu 17 Nov 2011, 14:09, 1 reply)

because
you can stick a flat-bladed knife into that thin slot, tip the box on its side and the coins will hit the blade and slide down it, out of the slot and into your hand.
( Smash Monkey lowering the tone of the whole internet, Thu 17 Nov 2011, 18:32, closed)