HI, I was wondering what we were going to do with nighttime shows as well--we just got back last night from our California trip, went to DL 3 days last week.
We have an almost 3 year old and an almost 6 year old, both girls.
I had also showed them bits and pieces on the computer.
For nighttime shows we saw fireworks, Fantasmic, and World of Color.
I had really hesitated on Fantasmic, wondering if it would be too scary for ours. But, they had seen the Peter Pan movie just before us going, and really liked it, and I thought they would like the scene in F! I told them they did not have to watch anything that scared them. I will say that F! is very loud, you are also pretty close to everything going on in the show, and some parts can be scary.
Our results--my little one has very sensitive hearing, so she wore Peltor Kid earmuffs duirng all three nighttime shows. What was interesting is that the reduced sound with the earmuffs reduced the intensity of the show for her, which was good. She watched the whole F!, would not let me cover her eyes for the parts I thought would be scary for her. Now our 5 year old on the other hand, during the scary parts, got down on the ground, put her head down, and covered her ears.
Then on our third night I asked which was the favorite show to see again, and our 5 year old insisted on F!, who again covered her head, eyes, and ears during scary parts, but insisted it was still her favorite, and loves to watch it now on the computer. 2 year old watched the whole thing again on the second time, earmuffs again.
So that's our F!, really recommend those earmuffs, helped a lot.
Oh, and we sat on the back of the sitting section right below the reserved seating (a recommendation I read on here)--perfect spot, was not crowded at all there before show, right in the center of the show.
WOC--I finally decided we were not going to wait 90 minutes for it, but I had read (here again) that to the left of the VIP section standing in the back was good. So, 5 minutes before WOC began we went over there and saw it there. More like behind the sitting VIP section to the left. View was not "close" as some people prefer, but we could see everything in the show (we held our girls) and the view from there is not intense at all.
I believe our 2 year old did the earmuffs again, but maybe not the whole time, as it was not as loud and intense as F!
I know you did not ask about fireworks, so maybe you have seen them and wanted to do something different.
And if you were just wanting your son to see a show period, we all LOVED the daytime Soundsational parade--it was actually my favorite show of all of them. Very energetic and happy, lots of characters.
And, for something at night, if you decide against F! or WOC, we visited Pixie Hollow at night--very pretty music and maybe every 15, 20, minutes or so a light display of colorful swirls plays in the water with beautiful music. IT is about a 2 minute show, no characters or anything, but nice if you want something mild for nighttime. We really enjoyed that as well, and nobody was there except us.
Good luck, it can be tough trying to figure out what they will enjoy, what to do now, and what to do for another time.