The keys on the piano.
![Picture](/uploads/2/7/4/4/27448393/6327501.gif?529)
The keys or notes on the piano are lined alphabetically from left to right. The keys to the left have a low pitch and the keys to the right have a high pitch. On a piano, the first key is usually C. C is always to the left of the 2 black keys. After C is D, E, F, G, A and B. The notes go from A to G and never H or anything after that.
Link to video: http://www.youtube.com/watch?v=zR_cwELdtHk