I have a four year old girl, she's been going on it since she was tall enough. She hides her eyes, says shes scared, and mostly doesnt wear the glasses. When we get to IOA thats the first thing she wants to go on. Like Johnny says, depends on the kid. The pyrotechnics are first class, there is really no lingering smell. You get one blast of heat (not flames) then you get a fireball effect with flames.....a few seconds later you get cooled down by another effect. Its not like Jaws or Mummy where the smell is prominent or the flames last for longer than a split second...my suggestion is to go on it using child swap....ride it for yourself first, then judge and see if the little tykes can do it.