My 11 year old was 7 last time we visited. He was about 50" and 70 lbs and was comfortable in the Disney strollers when he needed to sit down. He's now just over 5 feet tall and about 100 lbs and could still fit(though his legs would be cramped). The strollers really do have quite a bit of space width wise, though if they're super tall their legs might be a bit cramped.