Coral Island, also known locally as Koh He, is an easy and family friendly day-trip destination from Phuket.
This beautiful island has 2 main beaches (Long Beach and Banana Beach), where you can find a handful of restaurants, enjoy a few different snorkelling spots or just relax on its sandy beaches.
At Long Beach, you can rent a canoe and explore or just relax at one of the restaurants on the white sandy beach. Just around the island, Banana Beach Club serves a good selection of dishes, plus offers massages, canoes and plenty of Instagram-worthy set ups. You can enjoy some decent snorkelling from the shore there also. It is both kid and adult friendly with big loungers, tables in the shade and fun areas to explore for all.
You can also combine this tour with an afternoon stop at Mai Ton on the way back to try your luck spotting the dolphins there.