This set of wood blocks and cylinders is a unique way to introduce the concepts of height and depth.  The three natural wood blocks each have two holes: one that is the same depth in all three, and one that is a different depth in each. The three coloured cylinders are each different heights, and when used all together they can show a variety of comparison and measurement ideas.  Made of sustainably harvested rubberwood with water-based stains that will not chip or fade.