Egg Math

Karston really enjoyed hunting for Easter eggs this year. He keeps staging egg hunts throughout the house with the plastic eggs. This afternoon he also had an empty egg carton as part of the game. First he put his plastic eggs in the egg carton, and then he announced Mommy, I'm going to boil these for five minutes as he went around the door. He came back a second later, and I said I prefer hard-boiled eggs, but those take ten minutes. Karston came back with a quick answer, OK, I will boil these for five more minutes.

I assume having five fingers on each hand for ten total makes this easier, but he knows 5 + 5 = 10 already!