I grew up in a magical time of lawn darts, riding in the back of pickups, no helmet when riding a bike, and I played sports,skateboarded pools and ramps as well as rode motorcycles. Sports have become much more demanding these days but I'm sure just as fun as when I played. My concern as a parent is that their activities don't interfere with developing their biggest and most important muscle their brain. It's fun to play and be a kid but you will be an adult and need to be smart for a long time