Tar Tar the Harmless Dragon is a kinetic sculpture. He's made completely from recycled metal. "Kinetic" means energy in motion. He will move up and down for up to 10 minutes before stopping and if he's placed outside he will constantly move gently in the wind.
He came to be from the motorcycle springs and solid metal "feet" that were donated. I knew that the "feet" were heavy enough to hold a lot of leveraged weight easily. His body is made from some sort of steel ball float and his mouth is an old pair of metal calipers that were used with the pulley wheels on farm equipment to keep rocks and other debris from getting stuck between the pulley belts.