Family Trip Recommendations?

We are taking a family trip to Bonita Springs next week and I am looking for things to do. Our main goal is to hang out at the beach daily but I know we’ll probably need a few scheduled activities. We’ll have a my wife, myself, a grandma (age 60), and daughter age 9. We are renting a car.

Right now the only scheduled activity I have is a night time glow kayak tour. There weren’t many options on Trip Advisor. Any recommendations would be very appreciated! Thank you!