Ducks and Drakes

To make ducks and drakes: a school-boy's amusement, practised with pieces of tile, oyster-shells, or flattish stones, which being skimmed along the surface of a pond, or still river, rebound many times. To make ducks and drakes of one's money; to throw it idly away.
“to make ducks and drakes  of one's money,” to throw it away childishly—derived from children “shying” flat stones on the surface of a pool, which they call ducks and drakes , according to the number of skips they make.