Place is south of Hilo. Almost equal distance to volcano as Hilo. So if you are staying at Patti's place you need a car.
Hilo has some really child friendly beach compared to Kona. Kens pancake house is a big most.
But the fish and chips place Patti knows is worth a trip.
From her house there is access to the shoreline from which you can see the sunrise.
When going to Big island this homepage has on the insights you need.
https://www.lovebigisland.com/highlights/
Best
Carsten