"Crayola Crayons vs. Dollar Store Crayons: Whis is best?" It'll be as contentious as the 9mm vs .45 debate.
If that's truly crayon rather than paint I'm sorry to say that the first time some cleaning solvents are used the lettering will either dissolve or the solvent will get under the wax and lift them out.
However, dice don't get hot like a pistol would