Jig

A jig is kind of like a puzzle that helps people make things the right size and shape. Imagine you are making a sandwich and you want to cut the bread into a perfect circle. If you don't have a jig, it might be hard to make the circle just right. But with a jig, you could put the bread in a special holder that keeps it in place and makes it easy to cut the perfect circle.

Jigs are used for all sorts of things, like making furniture or building a house. They help people make sure everything fits together just right so things don't fall apart. Think of it like a tool that makes building things easier and more precise.