It's hard to decide which entertainment to see near Orlando, Florida first. Universal has a lot for kids, Spiderman, Cat in the Hat, Popeye water rides, some of the rides you can only go on with a child so this was the first time I got to ride them with my sister's kids. I guarantee you will want to come back. This was my first time at Sea World and it was a lot to see in 1 day, luckily we had the second day free to spend more time, and I still didn't see it all. It is good if kids like to see animals (like zoos and aquariums) and touch and feed them (dolphins and stingrays and sea lions) and watch shows. WDW is actually 4 parks and it is impossible to see in just 1 day.
Magic Kingdom has the classic rides (Space Mountain, Haunted Mansion, Pirates of Carribean, etc) mostly slow (but sometimes dark & scary) for kids and adults. Epcot has different countries represented, but not many rides, except the new one 'Mission Space' (more for adults); not as entertaining as MK. MGM has a good selection of rides for kids and shows and a couple adult rides (Rock-n-roll coaster, Tower of terror); my first time there was 2 years ago and it was fun but not as much fun as MK. Animal Kingdom is '' (not a zoo) but had few rides for kids and adults (safari, dinosaur); it was as interesting as a zoo, but not as fun as MK.
They also have water parks if you go in summer, and a racetrack / sports park, I've never been to yet. Obviously my favorite is Magic Kingdom. I definitely wouldn't go to Orlando without spending time at Universal/IOA too, I love Jurassic Park ride, and Back to the future ride, and ET ride, and new Mummy ride, and Men in black ride. (They " re rides are related to movies or TV) I went to Busch Gardens years ago, but my sister said they improved it a lot.
It's not just flowers and plants, it has lots for kids to ride too (more like fair rides). I almost forgot - it's free to get in Downtown Disney/Marketplace, there is shopping, restaurants, live music, kids can play while you shop. Similarly Universal has City Walk that is restaurants, movie theaters, shopping, live music etc. Also there is the Boardwalk that is free fun in the evening with live music and entertainment on the street, restaurants, shopping, etc. Or you can just take the shuttle to the monorail and ride from resort to resort and see the pretty scenery. I had a wonderful time..