I am just curious when you would start booster training. My son is 4, 40" and 34 lbs. I am not planning on puting him in a booster ANYTIME SOON, however, I was wondering when I should start booster training. Right now he is in a DC and Regent. When he outgrows the DC, I will probably get a FR. Between December and now, he has gained no weight, so he will probably not hit 40 lbs for a long time. He is very active and doesn't eat alot of junk food. Probably the only time he would use a booster is when riding with a friend or if we had a friend riding with us that needed the harness.
TIA
TIA