Concussions—brain injuries caused by a blow to the head or body—are common in contact sports. It is estimated that 3.8 million concussions happen each year in sports and recreational activities.

Dr. Robert Cantu is a concussion expert. He says that because kids' brains are more at risk for injury than adults' brains, tackle football, heading in soccer and bodychecking in ice hockey should not start until kids are 14. "Starting later is fine too," he told TFK.

But other experts believe that the risk of getting injured is just part of the game. Plus, if kids wear protective equipment and are taught to play correctly, they will reduce their chances of getting hurt.

Here, two readers share their opinions.

YES

Justin Sweeney, 11 Middletown Springs, Vermont

Kids of all ages should be allowed to play contact sports. Players should have to wear the right protective gear at all times or else they should not be allowed to participate. If you wear pads, a mouth guard and a helmet, you should be able to play safely and still have fun. If you follow the rules, that should keep you safe too. Starting contact sports earlier means more training and practice the way a sport is actually played. That teaches kids how to play in a way that prevents injuries.

NO

Sheriah Stephen, 10 Centennial, Colorado

Too many kids get seriously injured playing contact sports. Even if you are wearing the right protective gear and playing by the rules, you can still get hurt by other players. If you protect your body now, you have a much greater chance of becoming a better player later. When you are 14, your body is stronger and can handle impact better. When you are younger, your brain and body are more at risk for injury. Plus, older kids can better understand the risks and rules of the sport.

To access the digital edition of TIME For Kids, go to timeforkids.com/digital.