Not a hard one, you sit in someone elses home, watch their television, eat their food and listen out for the young ones. If they wake then comfort them that mum and dad will be home shortly. Do ensure that you have the parents contact phone number in case of an emergency. You could also advertise our service as a 'Parents Helper, very handy if your not of legal age to become a baby sitter. You simply assist with someone elses kids, it could be a hand in feeding them, playing with them and keeping tehm occupied or simple chores around the house.
Offer to clean your parents, uncles, aunties or grand parents homes for them, there is always a need for an adult to receive a hand in vacuuming, dusting and washing-up.
Everyone is familiar with the old fashioned lemonade stand. Of course, this is a seasonal business, depending on your location. During other times of the year, it could be a warm apple cider business -- but be careful of hot items. Also try selling coffee, donuts, snack bags, or other food items. If possible, set up a booth at a local community fair, or sale if allowed. If you live near to an event venue, lets say Twickenham for example, you could also set one up in your front garden for passers by.