The ESS:- Is a ‘table top’ Pipehenge module. Pipehenge is installed in many school playgrounds throughout the country Has a comprehensive handbook which include star templates. Tracks the azimuths of sunrise and set along the horizon throughout the year. Shows the height of the Sun at any time of the year for a given latitude (angle of light incidence). Shows the angle of the Sun’s path across the sky relative to the horizon. Shows why the changing length of dawn and dusk twilight is related to latitude. Shows the path of the Sun along the ecliptic throughout the year. Shows relationship between the lengths of daylight throughout the year and the latitude. Has zodiacal significance.