Bicycle helmet laws say that people need to wear helmets when they ride their bikes. This rule is to keep people safe and protect their heads. When you ride a bike, you can go fast and sometimes you might fall off. If you don't have a helmet on, your head might get hurt really bad. A helmet is like a protective hat that goes around your head to keep it safe. So, it's important to follow the helmet rules and wear one every time you ride your bike. If you don't follow the helmet laws, you might get in trouble with the grown-ups in charge. So, always remember to wear your helmet!