we buy this for we seven year old granddaughter and try it out before give it to she . glad we do as we do not find it particularly good and end up return it . we compare the cache with geocaching.com near we home . some be list , some be miss . basically you follow the arrow and supposedly find the cache - we do not . also the arrow keep spin so that in the end we do not know which direction to go . I would rather have the clue that geocaching.com provide , know if in fact there be thing to exchange and so on .