The Missing Egg
When my little sister and I were kids, we hunted actual boiled eggs. Where some people bought the hollow, colorful, plastic version for their small children to search for, my family just boiled some up, had us decorate them, and we hunted those.
All but one of the adults in our family would take the eggs outside (there were usually around two dozen), and hide them in various places in my grandma's yard. Then, once it was time for my sister and I to find them, we were released from the house. My sister and I were superb egg hunters, even at a very young age. It usually didn't take us very long to find all the eggs. The adults would count to make sure every one of them was found.
Every year, my sister and I would want to hide the eggs for the adults to hunt next. Of course, they humored us, gave us the eggs, and sent us outside to hide them ourselves. Typically, we would split the number of eggs in half, and hide each half on our own.
Well, this one particular Easter, we went through the same motions. My sister and I finished hiding the eggs, and waited eagerly for the adults to find them all. It didn't take too long to realize an error was made. No one could find the final egg. All of the eggs that I had hidden were already found, so it was one that my sister hid. When we were little, my sister had the tendency to forget where she would hide things. Now, all of us know this is an actual boiled egg, so we went to searching my grandma's yard as carefully as we could. The egg was still missing. We'd deducted it was one my sister dyed blue, but we couldn't find it. After a while, the adults decided we should just give up. It wasn't that big of a deal after all.
Weeks later, we were at my grandma's again and noticed one of our dogs had a blue tint around his mouth. He'd found the egg.