Yes, it is worth it, you have loads to.
Try the Natural Pool " conchi" or swimmable pool nestled among huge rocks on the northeast coast of Aruba, make sure that you have good shoes to walk on the rocks.
Also, you can book an excursion at ABC Jeep Tour, "Worth every penny!" they will take you all over the island, it's an amazing way to see the Island, It will give you a whole different sense and appreciation for the island.
You could try horseback riding, I would say Rancho Daimari is the place to go, the scenery is breathtaking, the horses are very friendly and well kept, this Ranch is located in the National Park.
You have Arashi Beach, this tranquil and secluded beach, it is known not only for its exceptional snorkeling but a variety of water activities including windsurfing, scuba diving, deep-sea fishing, swimming and sailing. The water is really clear, not murky like Palm beach. You can Snorkel right off to the side, the fish actually swim right over to you, it is really beautiful there.
Butterfly Farm is another place to see, it's just a few minutes from the Wyndam Hotel in Palm Beach, it's quite small, but it's a really enjoyable break away from the beach on a hot afternoon. They have landscaped gardens and little ponds with lots of beautiful butterflies floating around the lovely flowering plants.
If you like clothes shopping, try Agatha Boutique, Agatha's items are simply one of a kind and worth every penny!
The Kukoo Kunuku bus trip is an unquestionable highlight, if you like your fun organized, yet a bit wacky, this is the experience for you.
This crazy school bus, picks you up at your hotel- they take you for a champagne sunset toast at the California lighthouse, an excellent dinner and lots more fun at three local bars. You can bring a drink onto the bus with you while you're picking up the other guests.
Furthermore, you have many more things to do: Tranquilo Charter Cruises, Eagle Beach, Numismatic Museum, Showtime Aruba, Atlantis Adventures, California Lighthouse, Wilhelmina Park, Bugaloo Beach Bar I could go on and on, you will not get bored there if you plan your fun ahead.
You will have a great time for sure.
Try using the "build your trip" flight comparsion tool here:
Flights to Caribbean it will
search multiple websites and get you the best price.
Links of interest:
Things to do in the Caribbean Aruba