This USB stick is an ultra cool way to save and store data, whether at work, school or home. Crafted into the shape of a classic Stonehenge trilithon, the memory stick is a fun and functional souvenir of this magnificent site and a great gift idea for any Stonehenge admirer.Stonehenges true purpose is shrouded in mystery, but one theory is that it was a giant calendar. It is believed that the stones and the surrounding 56 Aubrey chalk pit holes make it possible to predict the spring and autumn equinoxes, when the sun shines directly on the equator and the length of day and night is almost equal.Rubber case4GB memory stickExclusive to English Heritage