Throwing crayons is not eco-friendly. I keep them and reuse them throughout these years.

These have been Zach's leftover crayons for the past seven years and this youngest son of mine is turning 10 years old this August.  He started using crayons when he was 1 1/2  and his first crayons were the bigger size which are not there anymore. I also reused ice cream container to keep the crayons. I keep on reusing these Zach's crayons for visual aids in school and for eco-campaign paraphernalia and marking important details on pages of my books or modules.