Dan's silliness adds 2-3 minutes of drag time to most of the
routines, but the explanations are
adequate.
One uses jumbo cards.
Before you shell out $95 for Science Friction, try this.
Elmers (the glue people) makes a Spray Adhesive. 4 oz. for
$4 at the dollar type stores.
Other spray adhesives would
probably work, too.
Just let it dry completely. You don't
want adhesion, just
friction. Might need to experiment with the amount of coverage and how
thick.