Crayons are a petroleum product and take many years to biodegrade. 
Each day, more than 12 million crayons are manufactured.The daily equivalent of 60 tons of petroleum-based wax that eventually ends up in landfills. 

Crazy Crayons and the National Crayon Recycling Program has been in the crayon recycling business for over 24 years and has collected over 120,000 pounds of unwanted crayons since the program started.