I have four children that range in age from 18 to 4 so I have had everthing imaginable on my walls!  Even my mother in-law was impressed!  Crayon can be very hard to remove from walls but it is no match for these.  I am someone who pays attention to details like smudges and dirt on the walls and the light switches, it drives me crazy.  With these sponges you can travel through the house with your sponge and a small bucket of water and clean them all so quickly.  No harsh smells either, big… read full review »