I just got home from work and am "finishing work" aka bumping and procrastinating and my girls are both upstairs and there are no screams or crying and it is the most wonderful thing in the world. DD1 is playing barbies and is 100% trustworthy on her own. I'm not even 100% sure Elena is in there with her and she is not remotely trustworthy but DD1 is very reliable to tell me if/when she is jumping on her bed, climbing into the crib in the nursery or mopping the floors with the toilet brush (yes, this is a semi-regular occurence, no matter where I store/hide it).
But it does make me wonder if I am crazy letting them play unsupervised upstairs... FWIW, I have full sight of the stairs and can hear both of them talking. But I will also let them play in the basement playroom together with the door open and me on the main floor ... but again, only if DD1 is with Elena.
DD1 7/10/08 DD2 8/11/10 DS 7/2/13