Hashing should be fairly easy to explain - start with a picture of some whole vegetables and maybe a meat (though perhaps not an actual pig....), show them all

Hashing should be fairly easy to explain - start with a picture of some whole vegetables and maybe a meat (though perhaps not an actual pig....), show them all chopped up, and show a "breakfast skillet" at the end. While discussing, make sure you point out that computers are machines that are really good at doing repetitive tasks like chopping numbers up the same way every time and recombining them. Heck, that can even make it easy to slip discussion of "salting" in there.