Using your Marin Rift Zone Junior 24 Kids Mountain Bike is a breeze. Just hop on, pedal, and have fun exploring the bike park or your neighborhood. Before each ride, make sure to check the tire pressure. It should be at an appropriate level for a smooth and safe ride. When it comes to maintenance, keep the chain clean and lubricated regularly. You can use a bike - specific chain cleaner and lubricant for this. Also, check the brakes periodically to ensure they are working properly. If you notice any strange noises or issues, it's a good idea to take your bike to a professional bike mechanic. And remember, as your child grows, you can upgrade the wheels to 26 inches and the cranks to a longer size for a better fit.