I came up with the name of my instrument because it shakes like a maraca and I made three different ones and the mathematical term for three is tri. The first shaker I made is a tin can and has rice in it. The second shaker I made is a plastic can and has beans in it. The last shaker (and my favorite!) is a glass jar and it has beads in it. The way to change my instruments' pitch is the different materiel in the cans/jars. The way to change my dynamics is to shake it harder or softer. It was really fun building my instrument!