Using this bike is easy. First, adjust the seat height so your child's feet can touch the ground comfortably when sitting. Then, teach your child how to use the grip shifter to change gears according to the terrain. When riding, tell your child to use the brake levers gently at first to get used to the braking power. For safety, always make sure your child wears a helmet. As for maintenance, keep the bike clean by washing it regularly with mild soap and water. Check the tire pressure every week and make sure it's at the right level. Every few months, take the bike to a professional for a full check - up to ensure all parts are in good working condition.