I have only visited in the winter. Although, judging by the website, there is even more stuff to do in the summer.
For me, Punderson= sledding. This is what parents meant when they used to say "Go outside and play." You know, before America turned fat.
It's not exercise if its fun. Then it's called "Play".
Come and play at Pundersons. They have snowmobiling, sledding, skiing... all kinds of things to do. See for yourself.
Oh, and the hot chocolate in the building by the sledding is really good.