Absolutely wonderful stay!
The house is well stocked from the kitchen to pool/snorkeling supplies. My friend's family and I stayed here together with our toddlers & there was everything from kid friendly plates to kid goggles, floaties, sand play toys, etc. We had brought our own kickboards & floaties, but didn't need to take them out at all. They even have a sizable cooler on wheels for bringing out on your adventures. The pool was a wonderful way to start/end the day.
The only downside is that food options are pretty limited, unless you want to eat overpriced resort food every day or plan to cook at the house a lot. It's about 30 minutes from Kona & Waimea, where there are a lot better food options. With 2 hangry toddlers, driving this distance for food wasn't always feasible.
Overall though, I'd still highly recommend the house!