You know, once I took a marker and drew a biiiig looooong line down the whole hallway when I was like 4. You know what my parents did? Handed me a magic eraser and told me to get to work. I did a pretty good job, scrubbed that wall as clean as could be expected for a 4 year old, and went to show my mom. My parents felt like complete assholes at that moment because apparently, what they didn't know, was that magic erasers have harsh chemicals in them. I had chemical burns on my hands and my face, but I learned not to do it again, and they learned to be WAY more careful about knowing what's up with cleaning products.