The Heritage Museum in Punta Gorda does virtual plane flying, space ship walks, sky diving, and many more virtual activities.

These places are fun and not expensive. Kelly Park Springs, Wekiva Springs, King’s Landing, Wekiva Falls, Homosassa Springs, Tarpon Springs where they dive for sponges, and Weeki Wachi, Bach Singing Towers, St Augustine, Ghost Hill, The Yearling’s Cross Creek, caverns a little north of Ocala. These are all places that cost little money.

Crystal River has kayak & canoe rental, lots of fun. Also gator land was a lot of fun for our grandsons. He is too old for legoland.

LunaSea Alpaca Farm is an alpaca farm located in Clermont, Florida owned by King and Lucy Lee Fowler.
we spent the day here, all the kids we saw had a great time

We took our grandson to GatorWorld and he loved it. Unfortunately they are temporarily closed due to COVID. Keep checking their website for updates at GatorWorld Parks - Drive-Through Alligator Attraction near Orlando, Florida

Horseback riding at Blue Moon Ranch at nearby Camp Geneva in Fruitland Park. They have a website

I take most of my out of town guests to Crystal River to canoe or kayak. We have seen manatee, huge gators and monkeys. In January, there were many baby monkeys.

The "Sling Shot" ride in Daytona is something he will remember for life.
 

The "Sling Shot" ride in Daytona is something he will remember for life.

if he likes nature -

Gatorland
Clearwater Aquarium
Sea World
Homosassa Springs State Part

Scubagirl finally found the travel guides in print.

Grandson
 

I've heard of an attraction down near Orlando that's called "Swim With the Alligators". It may be for extremely difficult grandchildren though. Not sure.

Gatorland, Orlando, is fantastic. You see tons of gators, some huge. Your can feed the gators. You can wrestle a gator (perfectly safe and a great picture for the kids). You can see several entertainingly hilarious and educational shows and there is a splash park that the kids love when the weather is warm. All of this at reasonable prices. Their upgraded "Grunt" package is less than $40 for adults, $30 for kids.

You should take him for a boat ride through the Dora Canal and maybe lunch at the Lake Side Inn....

Chase Animal Sanctuary. In Webster, about a 30-40 drive. Look up their website. Great interaction with lemurs and other animals. Don't dress up!

Winter the Dolphin - Clearwater Marine Aquarium. We just took our 11 year grand son to this aquarium and marina rescue. It was very interesting. Also did a boat trip into Bay Area to do dolphin sighting and other wild life.