My oldest moved into her big girls room right around the time of her 2nd birthday & my youngest has just made the switch & she's just approaching 2.5. HTH!

Also, in respects to them playing outside, I encourage my 2 to play out there a lot, but I am lucky I have big back windows & can keep a pretty good eye on them most of the time, we don't have a dog (yet) so apart from the usual thrills & spills, there is no 'immediate' danget to them.

Jayne