Legoland is only 20 minutes away from the venue. This could be something you do the day before the wedding if you plan to stay closer to the venue the night before!
Disney World is about a 50 minute drive from Bella Cosa. For those coming from out of town, I recommend coming in the weekend before and going to the Disney Parks or Disney Springs over the weekend. Allegedly the weekend before the wedding is one of the slowest times at Disney.
Seaworld is a great budget-friendly theme park to go to if you like animals and some of the best roller coasters you'll ride in Orlando! This is a little over an hour away from Bella Cosa.
Epic Universe, Universal's newest theme park, just opened up recently, so I highly recommend checking it out while you're in town! This is about an hour and a half from Bella Cosa.
If you're interested in a more leisurely activity, I recommend Bok Tower Gardens, which is just 10 minutes from Bella Cosa. They have beginner-friendly nature trails, gardens, and a children's play garden area, so it's fun for the whole family!