Dado set

A dado set is a tool that grownups use with a saw to cut grooves in wood. It looks like a bunch of round saw blades stacked on top of each other with little chippers in between. The saw blades are adjustable, so you can move them closer or farther apart to make wider or narrower grooves in your wood. Think of it like cutting bread, but instead of slices, you're making grooves in the wood to fit other pieces of wood into. It's a really handy tool for grownups who like to build things out of wood, like bookshelves or cabinets.