Well, I went out early, and I think she had forgotten getting them last night. They started peeping in all the commotion of everybody running outside, and broody puffed up, looked confused, made some noise, and pecked at them a little. Then she settled in happily. My boys and I went out again later to check on them, and all is well. She even let the boys give her and the chicks a little pat, but I'm trying not to bother them too much. They're so cute, and I'm so excited!
Here's another question. Yesterday I left a message for the people who were going to take the other 3 chicks, but I haven't heard from them yet. If I end up keeping them myself, would it be too late to add them to the nest box tonight or tomorrow night? I wanted to get the first two in there as soon as possible after hatch, but maybe I should have waited to see if I would have to keep all 5.