At least your 5 year old is being positive about it! My first hatch 10/10 didn't hatch, turned out none were fertile but I didn't have good candling guidelines yet so I didn't know.
I was no where NEAR as positive. I sort of just holed away for a few days because I was so sad and almost didn't try again, but videos of chicks hatching made me try again.
Keep with it! I've been trying with a LOT more eggs than I am willing to admit... we have some rubbish roosters and are now trying to isolate the one good rooster with some ladies to guarantee fertile eggs, but since you are so close the next one should be amazing!
From what I was told if there are still veins the chicks should still be alive. I was informed that the veins are the first thing to deteriorate, so if they are still there there might still be a chance! I've read a lot about people assisting when it gets this late in the game.... but I'm not going to recommend anything since I am still just a noob to incubating as well. Keep me posted and good luck!

Keep with it! I've been trying with a LOT more eggs than I am willing to admit... we have some rubbish roosters and are now trying to isolate the one good rooster with some ladies to guarantee fertile eggs, but since you are so close the next one should be amazing!
From what I was told if there are still veins the chicks should still be alive. I was informed that the veins are the first thing to deteriorate, so if they are still there there might still be a chance! I've read a lot about people assisting when it gets this late in the game.... but I'm not going to recommend anything since I am still just a noob to incubating as well. Keep me posted and good luck!