The Kamaole Beach Parks on Maui's "Gold Coast" (there are three of them, side by side) may be Hawaii's best to take the kids, while away the days, and do some safe swimming and snorkeling. The backshore, which is the town of Kihei, may be not be the most glamorous, a boulevard strewn with mid-level resorts and condos, franchise and local-style eateries, and pedestrian shopping centers, but it fills the bill for a no-nonsense, reasonably priced family vacation.
Just south (adjacent and connected by a beach walkway) are the high-end resort beaches of Wailea, and offshore are views of other islands, Lanai and Kahoolawe (although pictured here is West Maui, which appears as another island from Kihei). Throw in day trips of Haleakala National Park and the Hana Highway, and maybe a snorkeling safari to Molokini island three-miles offshore, and you've got yourself a sweet little family vacation. Sun is pretty much guaranteed.