Darth Vader leads his minions in a little soft-shoe to the tune of the Imperial March. This toy from Japan is called the Star Wars Space Opera “Pop’n Step” Toys. At the touch of a button, you can put the stresses of the real world aside and watch the villains from a galaxy far, far away dance while you laugh.
There are other characters and configurations available. They apparently sync up when you snap them together.
I wanted these for about five...