This simple multi-ramp tower can help toddlers begin to develop eye-tracking abilities by following the included coloured wooden balls as they roll their way down from top to bottom, one level at a time.  The tower stands 60 cm (about 2 feet) tall and comes with six wooden balls in two different colours.  The balls themselves measure 4.5 cm (about 1.75") in diameter, and are finished with certified non-toxic paints and clear coats so they are safe for handling and mouthing by little ones.  Minor assembly required with the supplied allen key tool.