My 8yo was never scared of fireworks as a baby or toddler. My 2yo (almost 3) loved them up until about 2.5, then went through about a 4 month stage of being scared of them (of course, our WDW trip was smack dab in the middle of that!) Now she's starting to like them again. It was the noise that bothered her. If we could watch from farther away, she still liked them, and now, she has learned to cover her ears.