your title question...do crayons cure depression? no crayons do not cure depression just like pens, pencils, colored pencils, markers they can not cure depression. here where I live they are writing, and coloring/ decorating utensils/ tools.

that said if you are a person who likes to use crayons it relax and calm you, just like someone who likes to work out at the gym will feel relaxed and calm after a hard work out, or someone who likes to cook will feel relaxed and calm after cooking something..

is this a cure no, its called doing something a person likes to do. if you like to do something of course doing that is going to make you feel happy and if you dont like to do something, doing that is going to make you feel bad...

example I enjoy using crayons where as my wife does not enjoy using crayons. we both have depression crayons for me helps me to feel happy and calm (not cured) my wife using crayons does not make her feel happy and calm, it makes her feel angry.

everyone has their own things that they like which in turn they feel happy. but curing depression no. crayons for me are just another tool I use but its not a cure.