Our first adventure in South Dakota was the Wonderland Caves. We had a great time down there. Benjamin was a little nervous at first but he settled into the new atmosphere and loved touching all the rocks.
Christopher found a slippery spot and fell on his bottom, no serious injury but very dirty pants. If you can’t already tell, Christopher dressed himself this day, and I didn’t notice the backward pants till after I took this picture.

Here we are at the top of the mountain, on our way inside.
Ventilation hole in the ceiling.

The kids with cousin Lisa. They had so much fun together. I think I could use a nine year old around the house. She was a lot of help with everything.
This is in the “big room”.
Always something to learn. Here Jason is pointing out something to the kids on the celing. 
Christopher was amazed with everything down there. He wanted to find some bats, like his shirt, but we had no such luck. All in all we had a great time underground.