1.) Did you know a piano has 88 keys? That is 52 white keys and 36 black keys!
2.) The flute is the only major instrument from the woodwind family that does not require a reed
3.) The trombone was made in 1450
4.) Saxaphones can be made up into 8 different sizes!
5.) The clarinet was originally made out of wood and when it was first invented, the instrument was played with the mouthpiece on backwards
6.) The xylophone was originated in Asia
7.) The worlds smallest violin is only 37 millimetres long!
8.) Did you know that playing the violin for an hour makes you lose around 90 calories? It's true!
9.) The cello bow is made out of horsehair
10.) The trombone is one of the oldest orchestral instruments, dating back to the Renaissance
Sources: http://answers.yahoo.com/question/index?qid=20081123132839AACJ3i9, http://www.ask.com/questions-about/Facts-about-the-Clarinet, http://www.schmelzertrombone.de/interesting_facts.htm, http://www.violinist.com/blog/Violinists2004/20068/5590/, http://www.fitday.com/webfit/burned/calories_burned_Violin.html, http://wiki.answers.com/Q/What_are_some_facts_about_the_cello, http://www.ehow.com/about_4883196_facts-about-trombones.html
