Snuba—a cross between scuba and snorkeling—is a great choice for non-scuba divers who want to go a step beyond snorkeling. You and an instructor dive off a raft attached to a 25-foot hose and regulator, allowing a dive as deep as 20 feet or so. This is a good way to explore reefs a bit deeper than you can get to by snorkeling. If you need a break, the raft is ready to support you.
Snuba Big Island. Meet your instructor at the beach rental area near the pool at the Courtyard King Kamehameha for a shallow-water dive experience without the hassle of scuba certification. Courses include a 30-minute class and a one-hour dive from the beach and three-hour boat dives that leave from Honakahou Harbor. Kids ages four to seven can come along on the Snuba Doo program, which keeps them doing snuba safely on the surface. The company also runs the 40-foot Kaha Nuola scuba boat, which accommodates all levels for a two-tank dive, not including gear. Courtyard King Kamehameha's Kona Beach Hotel, 75-5660 Palani Rd., Kailua-Kona, HI, 96740. 808/324–1650. www.snubabigisland.com. Classes from $89; dives from $135.