That's a great idea about the toys! I never thought of that! He has to have something in his mouth, especially when on the computer or an electronic device. He chews up all the collars on his shirts, he'll chew on paper, plastic, anything. I brought him to his doctor for it and she ran a test for a genetic disease called MTHFR and it actually came back positive, with a gene from me and his dad. It can lead to low weight gain, delayed speech, behavioral problems. We started the supplements for it and he put on 10lbs. He hadn't gained weight, only height in a year. So it's helping but not with the chewing. I'm totally ordering one of those toys because he always gets in trouble for the chewing.
I had one like that but it didn't develop. I would keep an eye on that egg. Especially in lockdown. I would candle 2 x day to look for an internal pip into the air cell. The chick may need assistance if it makes it that far.
The only way putting a safety hole into the air sac would help is if they were internally pipped but not progressing. I would just candle with a light and wait. We're these shipped or local?