Erik Per Sullivan getting chemistry lessons on the set.

<p>From <a href="http://www.sciencebob.com">www.sciencebob.com</a>. 'Science Bob' Pflugfelder has been teaching a lot of young Hollywood actors science from his mobile lab, a converted ambulance. His pupils have included David Gallagher, Michelle Trachtenberg, Jonathan Lipnicki, Hilary Duff, Frankie