The British Museum celebrates its 250th anniversary this year, and this special birthday bash promises 'an evening of entertainment and education' for the family. There will be a range of activities and games available, all inspired by the museum's extensive collections, so you and yours can learn to dance like an Egyptian, play a giant version of the royal game of Ur (the world's earliest board game), visit a Viking village, dig for some buried treasure and much more. Although the tickets don't exactly come cheap, all the proceeds from the evening are going towards the acquisition of the Ringlemere Cup, a 3,500-year-old gold drinking vessel recently unearthed in Kent.