Albert Einstein's favourite childhood toy that he cherished all his life will go up for sale next month for £46,000 ($60,000). The German game, titled'Perlen Mosaik Spiel' (Mosaic Pearl Game), consists of 520 coloured beads that can be inserted into a punch-hole frame to create patterns. The game shows some general signs of wear and tear, including minor chipping to the title label and'intriguing' pencil markings inside the box, which may represent his first autograph. The board game would have been cherished by the young and gifted physicist, who went on to win the 1921 Nobel Prize in Physics. Seller Bonhams New York describes the set as'a rare and joyous Einstein artefact of museum quality' and'an essential learning tool for the young genius'.