Sundial

3D printing a sun-dial is a great way to learn about our solar system, and the history of astronomy (from the ancients like Aristarchus of Samos, through to Copernicus and Galileo). Our sense of time is determined by the spinning of the earth, and it changes depending on where we are in our orbit around the sun. A sundial is a time-telling device that is most closely linked to these cycles. The more the kid understands about the earth and the sun, the better they will be able to place it more