People always think of Orlando as the Capitol of the Theme Parks. Is It? Yes there are many theme parks out there but there are many other things to do in Orlando as well.
Disney World has 4 theme parks along with  Disney Springs, formerly called the Downtown Disney.  The parks are;  Magic Kingdom( Copy-paste of the Disneyland in Paris), Animal Kingdom, Epcot Center and Disney Universal. If you want to go to these parks, make sure you be there as soon as the parks open. Otherwise you will have to stand in line for the rides. Y9u should go to the Disney Springs; It has  lots of restaurants and entertainment especially for the kids. It actually is the best place for the families to hang out in the evening.
Universal Studios have 2 parks. Universal and the Island of Adventure. I recommend to buy a joint ticket that will allow you to go to both parks. You can go to Universal Studios first and then take the Howard Express train at Harry Potter Village.
My favorite is The Sea World. Because I am in love with The Ocean and its creatures. Sea World has also other parks where you can swim with dolphins and snorkel. Aquatica Orlando offers Discovery Cove where you will enjoy your time in the water all day.
You have to visit the Winter Park when you are in ORLANDO. It is not a park but it is a city which was founded  1875, way before Orlando City. There are 5 lakes and on 3 of them, you can take a boat trip. The Boat will travel from one lake to another through the canals. You will see the beautiful mansions and hear their stories from your captain/guides. The trip will last 1,5 hrs. Everyday except Christmas Day. You will also view one of the best campuses of USA, The rolland College. The City center of Winter Park is very nice. The restaurants and the boutiques on cobblestone street looks very elegant. Bosphorus Mediterranean Restaurant is my favorite.
How about some space action. You can visit Kennedy Space Center which is located 1,5 hr away from Orlando. You can visit the Center and then do a beach break. Cocoa Beach is the closest and the most convenient place to do so.
You can do shopping in Premium Outlets of Orlando. One of them is the bigger one, The premium on International Drive and the other one has the more Italian i.e high category shops, Vineland Premium outlet. There is also Millenia Mall which is the upscale shopping Center of the City.
If you want to see some alligators, and do an airboat ride , you should go to one of the alligator parks in Everglades Park.  You can feed the animals and learn a lots about the alligators while you are out there. If you are familiar with London Eye, then you may enjoy The Orlando Eye which is located on the International Drive. There are many restaurants and lounges there as well. Try I-lounge, you can have hookah and drinks there as well.
You can visit St. Augustine which is 1,5 hrs north west of Orlando, by the Ocean. Due to being America’s one  of the oldest towns, visiting enchanting St Augustine will take you back in time, on this full-day from Orlando. You will probably  arrive St Augustine by mid-morning, that will give you almost full day for your favorite activities in this awesome town. You will walk around the cobble stone streets and admire Spanish Colonial buildings , treat yourself to  delicious seafood at a waterside restaurant, visit the historic landmarks.