Mushroom picking -national pastime

What's the difference between a button mushroom, a field mushroom and a death cap? A simple question for any Czech child, but a puzzle for most Westerners who visit the country. Every summer millions of Czechs head for the forest to pick mushrooms. Mushroom picking is a national pastime for men, women and children alike. How did it start and what makes six and a half million Czechs -more than half the population - addicted? Daniela Lazarova has the answers in this week's Magazine.