Okay, so you know how you can play music on your guitar or piano, right? Well, the Chapman Stick is kind of like a combination of both, but it's a little bit different.
Basically, the Chapman Stick is a long, skinny instrument that has a bunch of strings stretched out along it. It can have either 8 or 10 strings, depending on the model. And instead of playing it with your fingers or a pick, like you would on a guitar, you use your hands to tap or "hammer on" the strings.
One cool thing about the Chapman Stick is that each hand has its own set of strings to play, so you can create really complex, layered music. You can also use a technique called "tapping," where you use your fingers to tap out notes on the strings, which sounds kind of like you're playing a piano.
The Chapman Stick was actually invented by a guy named Emmett Chapman back in the 1960s, and it's been used by a lot of famous musicians over the years. It's definitely a unique and interesting instrument!