Check out this awesome Giant Spirograph! It was created by Nathan, who runs the DIY craft website HaHa Bird. Nathan’s oversized wooden version of the classic drawing toy measures eight feet across and uses sidewalk chalk to create those wonderfully familiar geometric patters on the pavement.
"The idea for this project came about at a craft show in December when a friend of mine had a little trouble with a laser-cut Spirograph we found. I teased her about her apparent lack of fine motor skills, then had the idea to make a Spirograph that only required gross motor skills. How big could I make a Spirograph?"
The project took Nathan about 6 months and cost roughly $150 to complete.
Visit HaHa Bird for a detailed description about how the Giant Spirograph was created and view complete process photos.