K.F.
Try Solumel. It's a Melaleuca product - amazing cleaner!! It actually removes permanent ink marker from carpet and vinyl, etc....It's a dilutable product, so try it full strength. Contact me on where to find it. It's toxin, and chemical free - completely safe to use in your home and around your kids.
K.
http://kellyis.stayinhomeandlovinit.com
myspace.com/luvinstayinhome