Selfridges have installed one of the cult Hayvend vending machines in the White Room bookshop. Pop in your £2 and you get back a random package the size of a pack of cigs. Two hundred artists have contributed to this so far. Inside the boxes could be any thing from an original drawing, screenprint or even a painting kit.

Hayvend at Selfridges, The White Room, 400 Oxford St, W1 (020 76291234) Bond St tube.
Open Mon-Wed 10am-7pm, Thur-Fri 10am-8pm, Sat 9.30am-7pm, Sun 12.30pm-6pm.