But my kids, oldest is 5 and 45 lbs, have ridden our stocky 36" mini in the past(since sold her).
However, today my 4 yr old asked if she could ride my 30" mare bareback. I looked at my daughter and I looked at my mare and I said "No way, you are too big for Fairy, honey!" She just looked way too big, 42 lbs to be sitting on her back. Of course, Fairy is my little favorite!! Instead we just walked Fairy to the busstop and had just as much fun!!!!!