Well done! You've found the piccolo!
The Piccolo is the highest instrument in the woodwind family. It is a half size flute so its pitch is very high and can be quite piercing. You can always hear when the piccolo is playing in the orchestra. It is difficult to play in tune, being an octave higher than the flute.
Usually made from metal, the piccolo is also held horizontally with sound produced by blowing across a big hole and pitch being changed by covering or uncovering the other holes in the body.