My 4-year-old daughter was eating a hard-boiled egg and reached the yolk in the middle. Being a farm egg, it was a little greenish around the edges.
“Oh no, mommy,” she said. “I don’t think this one is quite ripe!”
If you don’t have children, you should have some. They’re worth it in entertainment alone.
*image at top via Arnold Gatilao, cc license.