So cute! As for going outside, if it's really warm (close to your brooder temps for the first few weeks) during the day where you are, they can spend at least the daytime hours outside, but in the cooler weather they really need to be feathered out before they stay outside full-time. You will also want them fully feathered before you leave the outside with access to deep water unsupervised. Of course, you can always take them outside for little play-times as long as they're not out too long to get chilled.