jazzy, i have a 2 and a 3.5 yr old and to be frank, the best thing for them is the beach and pool.
we tried the submarine when they were younger and they loved it. but it's much too expensive for what you get.
depalm is a nice. we haven't been there since 5 years ago - before the water park was opened. but i'm not sure about spending 100 and being locked on the island for the entire day. the snorkeling was at best a 1 hour event. i'm not sure how the water park is.
snorkeling at baby beach would be a good outing.
maybe horseback riding?
but, i think a 9 yr old will be very happy on the beach or poolside and depending on the time of year you go, she may find some friends
We may be going to Aruba in April with myself, my wife and my 9 year old daughter.
I know there is swimming in the sea and also the hotel pool, but what other activities are there for a family? She's an okay swimmer, so snorkeling would have to be done in shallow water.
(I went there many years ago, but don't recall many kids, as it was mostly honeymooners. But, I also didn't really look for kids, either.)
You didn't say where you would be staying.....
Give us that and we can probably give you a bit more ideas.
I know my niece loves getting her hair braided. She also loves the snorkel cruises, catching crabs, having the freedom to walk around and get ice cream.
We ususally end up meeting other families where ever we are and the kids become BFF's in a matter of hours.
Some places have kid clubs, just depends on where you are staying.
One thing our kids enjoyed was the Atlantis submarine. We took them when our youngest son was around your daughter's age, and later we went again when we brought our niece to Aruba. You get to take a boat to the submarine, and the kids all liked that too. Nearby are the boat docks, and the kids all liked walking around looking at the fishing boats and the yachts. You may see everything from very small wooden sail boats to multimillion dollar yachts.
Our daughter's first trip to Aruba was when she was 8 years old.
She is now 15, and she has done...
Snorkeling Boca Catalina from shore
Snorkeling Jolly Pirates
Discover Scuba course and dive
Dive Certification & subsequent dives
Kids program at the Tamarijn
Kids program at the Radisson
Island helicopter tour
Watersports- tube rides, banana boat
ATV tour, she did not drive
4 x 4 tour
Island tours more times than she likes
...and I am sure I have forgotten others...
When we are not traveling with family or friends, she does not do much in the way of night time activities. When she does it is swimming in the pool.
Generally, after a nice dinner, a family tradition while on vacation, no TV , she may do a bit of reading before bed and she is out like a light, exhausted from all the sunshine and fresh air!