Well, I was a gym rat when my kids were really little, so at least they saw me exercising . However, we did do a lot of nature walks, etc, and I taught them to x country ski when they were 6 and 8. However, when I look at the family activities AMC has, I think, wow, my kids would have loved that hiking, riding, etc.
Fortunately, they went to a Mass. Audubon overnight camp for years,from ages 10-14 and there they learned all of the outdoor skills I didn't teach them! They slept in a tent for 4-6 weeks, one became great kayaker and the other learned how to sail. It was such a down to earth camp. They are both super active adults, so I guess I did my job.