Howdy. Ours are about 3 weeks old and for the last week, as long as it was over 70, we've been taking them out to a pen we made for a hour or so. Made the pen big enough for the wife and girls to get in and put a tote on its side with shavings in it. When they start getting tired or chilled they crawl up on ya or go into the tote and huddle up. Play times over.
Us too. At 2 weeks old they started outside. At 3 weeks they are staying outside all day long. 10 to 12 hours of fresh air and sunshine. Im in central Texas so temps have been optimal for the little ones. The way I see it. If the weather is nice, Id put them out at 4 days old. They are happier and friendlier now than they have ever been.
I have a little wooden crate they can go into. They go in and rest about 10 minutes every hour or so. After the little rest period they are tearing it up again.