Comment on Merlin and Cobweb by davepuls
And the smudge factor is exactly why I like them so well. Dust is always an issue though, and no one sells the keyboard vacuums anymore. I do think though that oil pastels would be difficult to get off my cats, and would stain anything they walk on after reorganizing my studio.
That's why I like oil pastels - there is no dust at all, and no mess. You just have to wipe your fingers with a paper towel after doing the finger painting bit. All of the pastel sticks to the paper!