Both my dd's 4 and 2 were terrified.
Actually, a lot of the kid were, all I could hear were screaming and crying and a lot of parents were walking out. We actually had to walk out as well and quite a few kids were unconsolably (mine included) and cried for a few minutes even once we were outside. I thought it would be a little scary but I had no idea. Keep this in mind for those of you with young one's . This was one of the first 3d attractions that we did and DD4 would not have any part of the others that I think she would have enjoyed had she not been freaked out by the bug one. I asked a CM at Philharmagic if any part was scary and he said no, it's too funny to be scary but as soon as the lights dimmed and it started DD4 started to cry. DH took her out and I watched it with DD2 who liked it a lot. By the way, it's a great show, try not to miss it. DD4 also cried in the muppets 3d movie and I had to take her out. We managed to calm her down for the Voyage to the Mermaid attraction.
You might want to save the bug one for last or skip it if you think your child will be the least bit scared.

You might want to save the bug one for last or skip it if you think your child will be the least bit scared.