One of the nests in the backyard has 5 baby wrens in it. The girls are watching the birds as they grow.
We checked on them again on July 31st and they have full wings and their eyes are open.
Wrens on August 2nd - http://www.flickr.com/photos/picturesbyann/4868600550/
By August 4th, when we checked on them again, the nest was empty. All were grown and had flown from the nest.
Needless to say, the girls are thrilled. It's been such a great homeschooling science lesson!