Amelia Island is an unusually easy island for families, and the reason is that its best attractions are outdoors, cheap, and tolerant of short attention spans.
There is no theme park here, no aquarium, and one small museum. What there is instead: a masonry fort children are allowed to climb around, a marsh trail with wild alligators visible from a safe distance, thirteen miles of firm sand, and a beach park with a playground and an ice cream shop across the road.
Start with Fort Clinch
If you do one thing, do this. Fort Clinch State Park gives you an 1847 fort with ramparts, galleries, cannons, a bakery and a garrison — and, critically, permission to walk through all of it rather than view it behind rope. On living-history weekends there are costumed interpreters in the fort. The park also contains two beaches and a fishing pier, so a fort morning becomes a beach afternoon without moving the car.
Budget half a day. Bring water; the brick holds heat and the ramparts have no shade.
The alligator walk that costs nothing
The Egans Creek Greenway is three hundred acres of tidal marsh with flat crushed-shell trails, and alligators are resident and often visible from the path. For a child, seeing a wild alligator from twenty yards is worth more than most ticketed attractions, and it is free.
Go in the first two hours of daylight or the last two — midday is hot, shadeless and quiet on the wildlife front. Keep children well back from the water's edge, and keep dogs leashed and close.
The beach day with amenities
Main Beach Park is the one to choose with young children: free paved parking, restrooms, outdoor showers, a playground, sand volleyball, picnic pavilions, and casual food, ice cream and mini-golf across the street. Nothing else on the island packs that much into one stop.
It is also the busiest beach on the island in season. Arrive before 10am or after 4pm, and walk five minutes from the access for space.
If the lot is full, Peters Point Beachfront Park on the south end has a bigger footprint and usually more room, with restrooms and showers but no playground.
Things that need a booking
Horseback riding on the beach at Amelia Island State Park is the island's standout activity for older children — the only Florida state park that offers it — and it is guided, reservation-only and sells out in spring and autumn. Book before you travel.
Guided kayak trips into the marsh work well from about age eight and are planned around the tide by the operator, which removes the one thing that ruins independent paddling here.
What to skip with small children
The Amelia Island Lighthouse cannot be climbed on demand — it is an active navigation aid on private grounds, viewable from the street. Children who have been promised a lighthouse climb will be disappointed.
Downtown dinner at peak hour with a toddler is a hard sell; the counter-service options and the courtyard restaurants are the better play.
A rainy day plan
The island's indoor options are limited: the Amelia Island Museum of History, the shops on Centre Street, and the resort facilities if you are staying at one. A genuinely wet day is a good day to drive to Jacksonville, forty minutes south, where the museums and the zoo are.