LOL You have the same as me 2 boys and a girl 10,8 and 7.My oldest son rides pretty darn good and my girl dont have any fear but my 8 year old son he is cautious. I think us babying him when he had cancer slowed him down some. But he likes to ride.My sons are 8 and 5 and have a 7 year old daughter and all 3 of themride it very well. my 5 year old can tippy toe the floor boards, they have 90s but out growing the quick. Not to brag but my 8 year old rides better than alot of adults I see riding.
My son was 8 when I bought him his TRX90. He started out on a battery powered atv that was handed down from a friend at age 3. I installed a 12 volt lawn tractor battery on it so he could drive it for several hours before it needed charging.How old is your son? My kids are ALREADY getting ideas....But I think they are a bit young still.
I'm not worried about my son so much as I am about my granddaughter on my wife's side of the family. She's 6 and the last time she was down, I had to stay on her about speed and had to run the throttle stop screw in more! She's more of a wild one than my son ever thought about being!Being catious is a good thing it should keep him alot safer and earn some respect an atv and not be wild like my oldest and think he cant get hurt.