Felt tip over walls? My two year old have just drawn adjectives over the walls with...

My two year old have just drawn adjectives over the walls with my blue bingo nouns - Its not funny!!! What can I use to get rid of it like a shot my walls were cream lol.....
Answers:    I don`t know try a flash eraser sponge.they work brilliantly and only cost a couple of pounds,much cheaper than a tin of paint....
... drenched cloth? sand it down and paint over it?