The Raskullz Bolt LED Green helmet has a light-up 3D fin hawk! Nine LED lights illuminate the rubber mohawk with a flashing sequence. The lights are activated by a button located on the back of the helmet and will automatically turn off if left on. The child size helmet is recommended for riders 5–8 years old, but will fit anyone with a head measuring 50–54 cm. Always take a head measurement. Head sizes and shapes can vary, even within an age range. Using a helmet that doesn't fit can be dangerous. Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older.