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; you can 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 get frightened or need a rest, the raft is right there, ready to support you.
Snuba Big Island. Rendezvous with your instructor across from King Kamehameha's Kona Beach Hotel in Kailua-Kona for 30 minutes of instruction and a one-hour dive in Kailua Bay ($79 per person). Boat dives lasting three hours leave from Honakahou Harbor ($125 per person). You can also dive in Kealakekua Bay. The minimum age for snuba is 8, but kids 4-7 can come along on the Snuba Doo program, which keeps them snorkeling safely on the surface.[. 808/326-7446. www.snubabigisland.com