Pre-school and kindergarten students at the Rainbow Montessori School in Madison are getting a head start on celebrating Earth Day by following the 3 R's - Reduce, Reuse, and Recycle.

The crayons start as a solid, melt into a liquid at temperatures above 120 degrees Fahrenheit, and return to a solid when removed from heat. [Related: How to Frankenstein old wax scraps into a ...

Lewis designs crayons of all shapes and sizes — more than 750 to be exact. “Some of our most popular: I design donut crayons, I create crayons that look like popsicles,” she said.

Fill molds with crayon pieces. I wanted my crayons to have an ombré look, so I grouped similar colors together, graduating from dark to light, but rainbow crayons would be fun too.