Tractor Bank.

May I introduce the heat sink that represents our Grandson's savings. Any £2 coins we receive are destined for these tractor banks. The lads do very well as the local shop keepers know about this scam extremely efficient savings scheme and co-operate by ensuring we always have at least one £2 coin in our change.

It's almost good enough to be used by Nigerians as a means of emptying our bank account.