Grinding wheel

Okay kiddo, have you ever seen a sharpener machine for pencils? It's kind of like that, but for bigger stuff. The grinding wheel is a big, round wheel that spins really fast and has rough edges on it. You use it to sharpen or smooth things that are hard, like metal or stone.

When you use the grinding wheel, you hold the thing you want to sharpen against it while it spins. The rough edges on the wheel grind away at the thing, making it smoother or sharper. It's kind of like rubbing sandpaper on something, but way faster and with a big wheel instead of a piece of paper.

It's important to be careful when using a grinding wheel because it spins really fast and can be dangerous if you're not paying attention. But if you're careful and use it the right way, it can be really useful for making things sharper or smoother.