Alrighty then ...
For the record, I prefer the ones with the little chimes in them. Technically speaking, I guess they would be called relaxation or meditation balls. Since I don't have vaginal muscles to strengthen, the Ben Wa variety doesn't really provide a direct benefit to me... sooooo I'll stick with the little jingley jangley ones and be happy. I've actually lost mine, so perhaps I'll go get me a new set someday soon. Or find a lady willing to share hers.
And an amusing Ben Wa letter to Sasha at the Montreal Mirror.