there are some foot and nail sanders in the health & beauty sections that make great paint stirrers or low torque grinders/sanders,,,,,a couple of them are the same shank size as Dremel bits,,,,,so far, I have one shaped like a fat penlight, and one that is almost a scale model of a Milwaukee grinder
the other option for $20 is a trip to Sally Beauty to get sanding sticks/blocks/pads, etc, and wooden cuticle sticks
Rex