All 120 Crayon Names, Color Codes and Fun FactsPosted: 12 months ago by 2manyusernames The average child in the United States will wear down 730 crayons by his 10th birthday (or 11.4 boxes of 64s). Kids, ages 2-8, spend an average of 28 minutes each day colouring. Combined, children in the US spend 6.3 billion hours colouring annually, almost 10,000 human lifetimes! Comments: 6 Score: [-] 502 [+].