Through building this color wheel, young students will learn the elements of mixing colors to achieve new colors. The mixing of primary colors is a basic part of all of our educations. At the same time, older students could adapt the color element to learn something about the elements. The chemistry behind Acid / Base mixtures with respect to their concentrations is easily taught with the use of color-changing indicator dyes. Either way, its really fun!
The inspiration for the entire project came from tumbling across the last image on this step. (source fails to be cited!)
Step 1: Materials
Wood for the wheels supporting the test tubes
String or wire to hold them up
Food coloring (water-based works best, but any kind will do)
I ordered my test tubes via Carolina Biological Company
They sell boxes of 48 test tubes for around $10 to $15 and have decently priced shipping. A good company!
They also sell universal indicator solution (not great quality, but still decent) if you want to use the chemistry approach.
A 1/2" drill was used to drill the holes for the tubes
a bandsaw was used to cut the circles for the wood form (use whatever you want here though)
and a tiny drill bit was used to drill holes for the string