B.S.
I've removed crayon stains as well as candle wax with an iron and a brown paper bag. Put the clothes (tablecloth, whatever) on the ironing board, then the paper bag and then iron over the spot that's stained. The paper bag is usually able to pull out the waxy/oily stain from the item with no problem. Keep moving the bag around until it's all gone. I've even used this technique to get candle wax out of carpeting (don't ask).
Crayons are made different with different brands so it may not always work but it's worth a try.