Making a (xylophone)

Guys if you are on my blog you should play a tune like a xylophone.

Play "Mary had a little lamb" like this:
3, 2, 1, 2, 3, 3, 3, 2, 2, 2, 3, 4, 4, 3, 2, 1, 2, 3, 3, 3, 3, 2, 2, 3, 2, 1

Just get 4 beakers and a pencil. Fill the 4 beakers with different kind of water length. After all of the beakers are in different lengths get a pencil or stick and bang the pencil softly on top of the beakers or on the side of the beakers, and know you can play different kind of tune.