At what age did you start giving your child pocket money?

We think pocket money is a great way of educating our child about the value of money - but also realise that the age (and conditions of payment) will vary depending on a particular family's circumstances, so there's no right or wrong answer. We started at him at 4 (when he could count, add and subtract) - we actually bought him a change sorting moneybox first - he enjoys watching the coins get sorted (although doesn't understand what it's truly for yet). Over time we will help educate him about saving vs spending.