I definitely think an appreciation and respect for the outdoors is something parent should instill in their children. The younger the better. I have a 4 year old, and I've had him outdoors pretty much all year round since he was about 1. He prefers outdoor play to technology and other indoor activities, and I love that. Not only do I think it is helping him become a more well-rounded person, but it's healthy for him and it brings him joy. What is better than that?