While I can say that Fantasmic can be both scary and loud, in parts, I never had a problem with either of my children being scared during the show - other than the normal "Ohh, that snake is scary!!" - kind of thing. As a matter of fact, on two occasions, I've had my kids on my lap and they've fallen asleep during Fantasmic. I think the key is that it's outside, in sort of a "football" stadium kind of setting, and if the kids do get scared, you can easily distract them away from the scary part.