Why not upgrade and add on either Snuba or Sea Trek to your tour:

SNUBA
Like to snorkel, but not ready for scuba, then try Snuba (SNorkel+scUBA)! Aruba's most popular underwater activity. Explore the beauty of Aruba's underwater world in the most convenient way. 'Go Beyond Snorkeling' and breath easily underwater without wearing heavy restrictive scuba diving gear. No snorkeling or scuba certification needed. A private guided tours permits underwater explorers as young as 8 years old to safely descend to a depth of 20 feet with the aid of a SNUBA instructor exclusively available with De Palm Water sports (45 minutes, including instruction).

SEA TREK
Catch the latest craze in underwater fun and adventure! Walking under water has never been easier or safer than with Sea Trek. Grab your swimsuit and get ready for the experience of a lifetime. Imagine exploring the underwater world and having your entire face and head remain completely dry. Using an specially designed helmet and air supply system. Everyone from kids to adults can walk underwater to a depth of 20 feet to explore the beautiful under water world. Great for the non-swimmer, no experience required, you can even wear your glasses. Just breathe normally and take a walk on the ocean floor. Found exclusively on De Palm Island! (45 minutes, including instruction).