The interesting thing is that when the Tippe Top inverts, it also changes the direction of the rotation! In other words, at some point during the inversion, the top stops spinning around the axis through the stem and then starts to rotate the other way. At the same time, the center of mass is lifted, and the top is thus a quite interesting problem concerning conservation of energy and angular momentum.
This is something that we’d like to see and hear in person: The Singing, Ringing Tree was designed by architects Mike Tonkin and Anna Liu in 2006. It sits on a hill in Lancashire, England, and as the winds blow, the discordant steel pipes “play” the wind. From Wikipedia:
Some of the pipes are primarily structural and aesthetic elements, while others have been cut across their width enabling the sound. The harmonic and singing qualities of the tree were produced by tuning the pipes according to their length by adding holes to the underside of each.
"It was the craftsmen who mastered the remarkable properties that go with specific materials. They were the first to journey towards the atom. The goldsmiths slowly refined their craft to take advantage of what gold alone could do…”
Captioned as a “2nd Grade project to make a homemade instrument,”Homemade Xylophone - Kidshas been online since October, 2006, and is a great metal and pvc pipe how to for kids, with a bit of parental assistance.