My crazy kids

I have two small boys as you might already know. They have quite different personalities but are so similar at times. Recently my oldest started writing his name and won't stop writing. He loves to write you give him a pen and paper and he is happy. He would write or draw whatever he feels like doing and you will not hear from him in a while. My little one has noticed him writing and now wants to do the same the only difference is that he is only two and instead of writing or drawing on the paper he draws on the walls, tables, ect. and eats the crayons or pencil erasers.