Book ahead. Weeks for a day course in season, months for a camp place. Sessions are small by design.
Location. The campus sits on Periwinkle Way at the eastern end of the island, within reach of the Shared Use Path, so families staying anywhere on Sanibel can ride there rather than solving parking.
What to send them in: swimwear under old clothes, a rash vest or long-sleeved sun shirt rather than sunscreen alone, a hat that stays on, water shoes or old trainers, a towel, a refillable water bottle and a dry change of everything.
Sun. Reef-conscious sunscreen, applied before arrival, is the norm here rather than a gesture.
Insects. Less of an issue on the open beach than inland, but repellent for the walk to and from is sensible.
What not to expect: a gift shop, a café, an exhibit, or somewhere for parents to sit and watch through glass. This is a working education organisation with a car park and a building, and the interesting part happens on a beach.
Ask about accessibility directly. Sessions are held outdoors on sand and in shallow water, and what can be accommodated depends on the programme and the day.