Paddle2See made a great project called "Perpetual Slinky." This is a REMIX of his project because Dr Cat realized that its effects should be TAUGHT! --------------------------------------------------- You may have seen Dr Cat teach PARABOLAS. Here's another science lesson.....according to Dr Cat. ---------------------------------Enjoy! Larry828 From Paddle2See's Project Notes: This project is just a simple visual effect. I was thinking about parabolic curves and I decided to make a project to demonstrate how handy they are for making trajectories. So if you want an object to be thrown from one location to another, a parabola is a good curve to use. Enjoy!