Yes. Despite that fact that just 21 states have mandatory helmet laws for children, your little ones absolutely do need to wear a helmet whenever they are out on their bike. A study published in 2016 found that wearing a helmet will reduce the probability of a head injury by a whopping 50% and reduces the chances of a serious head injury by nearly 70%. While your little one may not get into an accident while they’re riding their bike, the helmet will be there to protect them from devastating injuries in case it was to ever happen.