My wife's employer paid for an all day pass to go tubing at Snowbasin. I had never gone before but wanted to check it off of my list. It's fun and very kid friendly. It's unfortunate that they don't allow doubles or chains going down the hill, but they do have 3 runs side by side.
I think the regular price for all day tubing is $30
http://www.youtube.com/watch?v=kEmDvzKAFVI