This is a private tour and you need to contact the guide directly. We did this tour without any kids but the first part of the tour is very kid friendly the tunnel is completely lit and they have a nice place for the kids to sit or explore in the main opening of the cave. There is good footing in this area but further off of the track it gets tricky.
This is one of the most amaing things we ever did on this island! You are actually crawling and climbing through an extinct lava tube, if you thought that the thurston tube was cool you will be amazed by these. Our guide was very kind and accomodating to our skill levels. At one point we all turned off our lights and it was the darkest I could have ever imagined, you could see absolutely nothing!
It was so cute when we took this tour their dog followed us the entire way. My favorite memory is when we crawled in an opening less than 16 inches and the little shepard came with us! It was so sweet, the owner said we were treated because she doesn't usually follow the people through the entire tour!
As this is a private tour it was just my husband and I, you really get a great experience and can learn a lot! The basic tour is $10-$15 and the deluxe off the trail goes up to $95.