Wekiwa Springs state park has a springs swimming area, canoe rentals, tubing, etc. Its a great park about 20 min from Orlando.
check out
http://www.internationaldriveorlando.com/
there is a fun Ripleys Museum, Wonderworks, a fun park, all kinds of fun stuff! Escape room games, zombie apocolypse stuff,
Also about 30 minutes outside Orlando is the Central Florida Zoo, but its honestly not so fabulous anymore.
In Downtown Disney, which is a shopping area, there is a huge Lego store, Hot Air Balloon rides, awesome bowling alley and movie theater, all kinds of themed Disney Shops that is free and just fun to do.