Cinderella and her lesser-known twin, Tinderella, split everything right down the middle. They each do half the housework, half the mending, and half the mean step-sister tending. When the Prince throws a ball, their fairy godmother sends them both, and they dance the night away with the prince. But he simply can't choose between Cin and Tin, and they are in need of some clever thinking and just a pinch of magic. The Prince agrees to share his kingdom half and half, and the fairy-godmother makes him a twin too, so they can all live happily ever after. Cin and the Prince rule the kingdom, while Tin and the Twin win all the kingdom's math competitions. It truly is a happily ever half-ter.