Robin eggs

Noah and I went for a walk and found a bird nest blown out of a tree.  There were three eggs nearby.  One was smashed, and two were just slightly cracked . We brought those two home. 

This is what we found inside one of the eggs.  The tiniest bird I've ever seen, but perfectly formed.  Its little umbilical cord was attached to the yolk.  Noah put the other egg in a sock under a lamp and is trying to hatch it.