Tower of Hanoi is the classic stacking puzzle, baked into a picnic. A cake of smiling layers sits on one cake stand, and Wombat the baker wants it moved to the gold star stand. Tap a stand to lift its top layer, then tap another stand to put it down, or just drag it. The one rule: a big layer never goes on a small one. If you try, the layers make a funny face, wobble, and the stands that work glow green, so there is nothing to lose. It starts with tiny two-layer cakes, then grows to three, four and five layers. Stuck? Tap Wombat's light bulb and he points at a good move. Visit a picnic park, a sunny beach, snowy hills, candy land and a starry night, and win a new topper for your cake every stage.