my ds takes me on it every time we go, lol!
he was 3 when he first discovered it and 4 on the last trip, so 38-41", give or take. i don't think that there is a height requirement, but be warned that this ride is not as innocent as it looks! not only does it fly high, but at high speeds. about does me in every trip and 14 yo dd laughed until we made her do it!