I have read several different things that says there's nothing for children to do at Epcot. On my next trip I was wondering how much time I should spend in Epcot with my 6 year old niece and what rides and attractions we should do. And how much time I should schedule to be there.
Here is an honest assessment. I'm sure I will be accused of being negative, but that is not my intent.
Summary. Epcot is not completely boring, but there are some things lacking for the kiddos. If it were me, I'd spend one day at Epcot, concentrating on the front section, possibly getting to two or 3 of the more kid friendly countries in the back section, let them pick out a place to eat (make sure you reserve it before hand) see Illuminations, and call it a day. Maybe eat a princess meal if yours are interested in that. Or eat somewhere else in world showcase if they are not.
long version.
First World Showcase.
There are some things to entertain a kid, but be prepared to skip a lot.
Nearly half of the countries in World Showcase are nothing more than shops and one or two eateries. To keep the kids entertained (or more accurately to placate them just long enough that they don't howl in protest, ) Disney has thrown kidcot stations up, where the kids get to color. They also provide a compulsion to complete a project such as a mask that they attach various cut outs of things from each country. But it's a pale substitute for actual attractions. And of course, you could let the kids color at home for about $5 for supplies that will last a long time. And to be brutally honest here, if Disney is throwing this at the place, they know there is otherwise a problem with the kiddo boredom factor. There are various mall quality shows that are there too. A couple of these have an amusing little show like the drums in Japan or the traveling comedy squads in Italy and England. But much of the comedy goes over a kid's head. There are a couple more countries that are what I just described above plus a little movie to tell you about them and a couple more with a genuine attraction and a show.
For this back section, I tend to suggest Mexico. Inside the pyramid there is a boat ride. I tend to suggest Norway. The Maelstrom is fun. There is also a little movie. I also tend to suggest the Acrobats in China. That is really fun to watch and there is also a movie with a pre show. I also tend to suggest doing some combination of these, plus eating dinner somewhere (make sure you get reservations) and save the rest of world showcase for another visit.
Future World.
Here I think you'll find a lot more to do for the kiddo.
The living Seas. Everything in here is right up kiddo alley.
The land. Ditto.
Imagination. Ditto.
Ellen's. This can be long, but if they're in to Dinosaurs, they'll love it.
Mission Space. Green side is fairly tame in a Star Tours light sort of way. If they don't like small spaces, stay away.
Test Track sounds and looks bad, but it's really not. It's a mild thrill the kiddos usually like.
Innoventions. This is pretty much filler. Many of the video games are of lesser technology than the Wii. But the build your own robot is fun.
The character meet and greet is an excellent spot to meet the main characters with shorter lines than in Toontown or camp Minnie Mickey.
Space Ship Earth.. Actually kind of neat. Kiddo's seem to like going backwards at the end.
All in all, I think Epcot is worth a day and children can have fun there. But I also think the repeat factor is very low on certain attractions and some of it is simply not up to par despite the stop gap kidcot stations thrown at it. Hope that helps.