Children are ready to ride their bikes with gears only after they have learned how to ride a bike, and they confident while on it. Teach your child the art of changing gears by taking him through the process slowly. Help by lifting the bike such that its back wheels move off the ground. Then ask your child to change gears by using the twist-grip shifter after pushing the pedals forward with your hands. Your child will now see the chain move up and down.\r