On fabric, try spraying a little bit of WD40 onto the spot and dab until clean with a rag. Then you should wash the area with liquid dishwashing soap and water. Repeat as needed and make sure you do not put the item in the dryer until you are sure the crayon stain is gone.

You can also try WD40 on crayon markings on walls and other hard surfaces. Scrub the sprayed area with a clean, dry rag or even with a toothbrush. Another solution you can try for crayon marks on hard surfaces is a bit of baking soda mixed with just enough water to make a paste.