Morris and Yuka have prepared everything you need for snorkeling and other activities. The house is neat and organized. My 3.5-year-old daughter likes this house more than my own.
The location is great as well. The most exciting discovery of my trip is the geotherm pool/bay (Ahalanui Park) which Morris recommended. We visited this park everyday for 2~3 hours (https://goo.gl/maps/gq7JzTFGpM72), and both my daughter and my mom learned swimming and snorkeling.
I had some difficulty to find his house, mainly because airbnb translated the address into Chinese and my iPhone cannot recognize. I would suggest to send google map links to the guests in the future. (I just notice that airbnb doesn't allow to share such information.)