I also have autistic children, and just about EVERYTHING we do is a "game" involving their favorite Disney characters or whatever they are "in to" at the time.
For toothbrushing, I placed "Cars" stickers in the sink, and the "winner" was the one who could spit their toothpaste on the most stickers! It worked!
Since they don't do a great job brushing, I also have them dip their toothbrushes in a cup of ACT fluoride rinse, and brush their teeth with it (in addition to toothpaste)--it's safe to swallow little amounts of the fluoride rinse--every little bit helps!
at 8:53 PM on Dec. 7, 2008