Both! They are so different. My kids ages 4, 6 and 9 love MK and Epcot. Sometimes they say Epcot is their favorite park. Of course, you can't go to WDW without seeing the MK. My kids love going to science centers and museums with hands on activities. Epcot has a lot of that. You can also find a lot to do inside without waiting in long lines. Epoct is a great place to be if the parks are busy, hot or raining. Many people think kids will be bored at Epcot. Not so.