The Ten-Ten Dama is one of those toys that's so cool, only the Japanese could have come up with it. Toss the brightly-colored crepe ball into the air, and watch it expand, contract, and invert itself right before your eyes! There are no fancy electronics inside, just expert craftsmanship built on simple physical principles. Kids (and adults) will have hours of fun playing with this ball together.
Really couldn't have said it better myself. It's a do nothing toy but it's nifty!