I wear my 3yo in a pouch, mei tai or ring sling. I don't have a main carrier, I switch them out depending on what I'm doing. I don't wear her all the time, just when we're out shopping or going for a walk. She is 27lbs. I'll keep carrying her until I can't or she doesn't want to anymore. I am guessing I'll be stopping before she does, anytime I am working on a carrier she wants a ride.lol