Wait till they get to the part about AM and PM. “…so an hour after 11AM is 12PM, then comes 1PM, 2PM and so on until we reach 11PM, and an hour after that 12AM, which is actually on a different day. And once we’ve been doing this for a while, we’re got an idea for something we’re calling Daylight Saving Time, but I’ll explain that later.”
It goes back to the base-60 numbering system of the Sumerians. Same underlying reason there are 360 degrees in a circle.
Wait till they get to the part about AM and PM. “…so an hour after 11AM is 12PM, then comes 1PM, 2PM and so on until we reach 11PM, and an hour after that 12AM, which is actually on a different day. And once we’ve been doing this for a while, we’re got an idea for something we’re calling Daylight Saving Time, but I’ll explain that later.”