I think Epcot is WONDERFUL for younger kids. Mission Space is probably the only thing too intense - and that has a new "no spin" option. If theyre tall enough; Soarin and Test Track should be fine. Honey I Shrunk the Audience 3-D and Maelstrom might be a little scary for some but many do just fine. Spaceship Earth, The Universe of Energy (Dinosaurs & 45 blessed minutes of air conditioning), and Journey into Your Imagination with Figment are all visually interesting for kids. One of the Innovention pavilions has a lot of things geared for little ones. The Living Seas is great for kids marine life & Turtle Talk with Crush are fantastic. The Land has a character meal and there are Princess meals at the Norway Pavillion. There are Character Meet & Greets all through Epcot. There is some great entertainment too the Jammitors are a Stomp like percussion group and Kristos is a Cirque du Soliel type balancing act.
There are Kidcot stations throughout the World Showcase. Kids can make a cardboard mask (free) at which ever station they stop at first. Then they can add a decoration at each additional station. The boat ride at the Mexico pavilion is similar to Its A Small World. Young children may or may not enjoy the American Adventure or the Circle Vision movies in China & Canada. If I was going to choose one, Id go with the China movie. There is a little hedge maze in the UK pavilion that is too short for adults to find challenging but I saw a bunch of kids gleefully running through. I also saw kids intrigued by the model train at the Germany pavilion. My kids loved wandering through the Morocco pavilion. There are Koi fish in the pond in Japan. Norway has a Viking boat play area. There is some fantastic entertainment that kids will enjoy: The Serveur Amusant (France) is a comedic balancing act. Japan has three great things for kids Matsuriza is a traditional drum act; Miyuki is a very neat candy artist, and there is a Japanese Storyteller Honobono Minwa on Wed, Thurs, & Fri. Sergio (Italy) is a juggler. OrisiRisi, he drum circle and African Storytellers (Mon- Fri) in the Outpost get good reviews. Kids always love the Dragon Legend Acrobats (China) because they are children too. Some kids will enjoy Off Kilter (Canada) bagpipe rock and MoRockin (Morocco) Middle Eastern pop sounding band. IllumiNations is the evening fireworks show and it is excellent.