Well done! You've found the clarinet.
The clarinet is a member of the woodwind family of instruments. A person who plays the clarinet is called a clarinettist.
It is a cylinder shaped tube. The wooden reed is attached to the mouth piece and held on with a clamp called a ligature.
The sound is made by the reed when the player blows air through the instrument. The sound can changes when holes or silver buttons are pressed, covering the holes underneath.
There are different types of clarinet and the instrument can often be heard in the orchestra and in jazz and blues music.