Well done! You've found the flute!
The flute is a high pitched member of the woodwind family. While some flutes are still made of wood, most are now made of nickel, silver or gold metal shaped into a hollow cylinder.
The flute is held horizontally to play and you blow across a large hole in the side which makes the air inside the flute vibrate. The player, a flautist, also uses their fingers to cover patterns of holes in the body to make a different melody.
The flute has a sweet sound but can also sound sharp or loud. Flutes do not use reeds like other woodwind instruments and they may be the earliest known melodic instrument.