I had a broody that stuck and hatched a few last year. And another broody that wont stick to the nest (box hopper) but will take chicks. I had a wonderful blue orp hen that was a great broody, but lost her a couple years ago.
The Wyandotte eggs did not fare well, but the breeder offered to ship me replacement eggs when ready for only the cost of shipping. Most were clear with floating air cells and a couple blood rings. Out of 14 I have 5 or 6 of those left. They are more torpedo shaped, so worry about that as well.
Little Girl insisted that for her "Share Day" today that she take a chick in. Except we don't have chicks yet and they wouldn't survive. She was adamant. Settled on taking the book "Dora's Eggs" and talking about chicks hatching instead.