Okay kiddo, do you know what a plate is? It's a flat thing that you put food on. Now, a jack of plate is a kind of tool that helps you hold that plate in place. Imagine you have a big plate of spaghetti and you want to carry it to the table without it spilling. That's where the jack of plate comes in. It's like a big clip that attaches to the edge of the plate, giving you a better grip and making it easier to hold the plate steady. So, the jack of plate is really just a helper to make carrying your food more manageable.