Using this Globber toddler helmet is easy. First, adjust the size with the Dial Lock to fit your child's head comfortably. Then, put the helmet on your child's head. Make sure it sits evenly. The 3 - mode LED flashing light on the rear can be switched according to your needs. For daytime use, you may not need the light, but at night, turn it on for better visibility. When it comes to maintenance, wipe the outer shell with a damp cloth regularly. Don't use harsh chemicals as they may damage the polycarbonate. Also, check the EPS foam liner and sealed foam pads for any signs of wear and tear. If you notice any issues, it's time to replace the helmet. Always keep the helmet in a cool, dry place when not in use.