WinterRose, just join a marching band! Or, how about walking and chewing gum at the same time? :-)

The beanbag thing is described here:

http://www.newscientist.com/article.ns?id=dn3012
http://www.boston.com/news/local/art...rcise_instead/

Sounds like an easy thing to try (instead of paying $4,500 for it; Wow! Reminds me when the first computers came out, how expensive they were compared to now) I don't "use" my balance much since I sit all day and work at the computer or watch TV, etc., maybe I'll try some of these exercises and see if something changes.