Play it here

It’s a cute, addictive little game that can waste a lot of time.  You start with pieces for earth, air, fire, and water.  If you put the right pair of pieces together, it will make another piece.  So for instance, if you combine water + air, you get rain.  The goal is to find all 240 pieces.

Here’s where it gets tough.  It marks which pieces are dead ends.  There are 217 pieces that aren’t.  And since some of the combinations only make sense in retrospect (sky + cheese =moon), it makes sense to just try everything.  That’s 8128 combinations!