for the clothes-- rewash in very hot water with a full bottle of "spray'n wash" (not shout). Rewash w/ regular detergent-- this will get most crayon marks out. Any left you can use WD40 on the stain. Spray on top and use paper towel underneath blot out the crayon, don't rub or it will smear. Then for any WD40 grease marks- use dishwashing liquid and hot water to hand wash out any grease stains.
As for the dryer- use WD40, on a cloth and rub (a lot). For the lint trap, I'd take it outside and spray (w/WD40) until it is dripping and blot dissolved crayon off. Make sure to check the washer for crayon residue- use WD40 to clean as well. Make sure to wipe down w/ water the dryer and anything you've used WD40 on-- it is flamable.
We experienced the crayon waher/dryer mess...I had to throw away just one article of clothing from a very full load. Best of Luck to you!!!