First, you should keep in mind that you need to find a spot to watch, ideally at least 30 minutes before the show. The obvious spots fill up very quickly, and it is truly a different show if you are able to watch without heads and babies on shoulders in front of you. Finding a spot and sitting there shouldn't be a problem, provided that you've visited EPCOT with people you enjoy, and don't mind listening to excellent music for a while.
Another few things to keep in mind are as follows: The show is hot! There is a lot of fire involved, and being too close to it may be uncomfortable for some children. In addition, keep in mind that there are a couple islands on the lagoon. While beautiful, these islands can get right in the way of the show if they are between you and the floating globe that possesses the spotlight for the majority of the evening. Finally, watch out for falling shells! If you are too close to the show, there is a good chance that shells from the fireworks can fall near or on you. If that scares you, don't be too close! Here is a list of my favorite spots:
- The platform which extends from the bridge between the UK and France is an excellent place. There is a tiered platform with staircases, which is designed specifically for the viewing of the show. On many nights, nearly the entire platform is rented out for private parties, so make sure to check before-hand!
- Germany has a wonderful view of the show. The railings across from Germany are many times some of the last places to fill before the show, and there are many excellent spots! Several square-shaped offshoots sit along the shore, and provide a close and beautiful view without being right in the middle of it.
- Mexico has a couple great options! The Cantina De San Angel is a wonderful place to watch if you can snag a table at the right time. It is right on the water, and provides a very good view. If you want to be outside and along a rail, the pathway just south of the pavilion is very good.
- The Rose and Crown Pub at the United Kingdom Pavilion is a romantic little place that provides fantastic views of the show. You can talk to the wonderful English bartenders and be right on the water in a charming atmosphere.
- There is a vista between the two Plaza buildings at the entrance to World Showcase from Future World, between Mexico and Canada. This area, usually reserved for fastpasses or events, provides a very very close view of the show. It is usually very busy, and doesn't particularly have the same charm as being at one of the pavilions. Did I mention it is close? I have been hit by falling shells from the show at least twice here. If you want a close experience, come here!
There are many other good spots at EPCOT to watch the show. Explore and find your favorite! And enjoy the show (as if you could not enjoy it).