That instrument is called a slide whistle. It produces sound by varying the length of the air column inside the whistle by moving the slide up and down.
Because it looks like a stick!
It's called a xylophone stick, depending on the type of instrument. Some types are referred to as beaters.
Maracas are percussion instruments that comprise an egg-shaped, bead-filled shape at the end of a stick
The stick insect is an animal that looks like a stick.
That little stick they use is called a "baton."
pateteg is an musical instrument that is played by a stick
It's called a Rain-stick.
hard question, but what you do is stick it between your thumbs and blow.
Ruler, meter stick, yard stick
Ruler, yard stick, meter stick.
A yard stick
You stick it in the end of your instrument