What it does: An ingenious building block and marble run toy from Switzerland, Cuboro allows endless combinations and designs.

Why buy it: Cuboro is one of our favorites here at Oh! Toys.  Part marble run, part puzzle and part developmental and educational marvel, Cuboro is truly a "heritage toy" -- one which not only can be passed from one generation to the next, but which children will come back to time and again as they grow and become more sophisticated about their creations.