BERLIN (Reuters) - Visitors to a tourist attraction in Berlin have been making off with an unusual memento the 30 cms long tail of a Lego giraffe. The Lego tail belongs to a six metres tall model that has stood outside the entrance to the Legoland Discovery Center on Potsdamer Platz since 2007. Its a popular souvenir, a spokeswoman for the centre said Tuesday. Its been stolen four times now ... The tail is made out of 15,000 Lego bricks. It takes model workers about one week to restore it at a cost of 3,000 euros ($4,300), the spokeswoman said.