Before the week is out...: Stamp this

WANT TO leave your mark on the world? Better get yourself a Sega Stamp. Looking like a cross between a photo booth and an arcade game, the Stamp Expressions booth allows you to choose from a range of backgrounds - cars, rock stars, monsters - add your own text and picture (which it takes on the spot) and leave a personalised "I woz 'ere" wherever you fancy. Visitors to the booth at London's Photographers' Gallery have created a huge collage of theirs. Just don't stamp anywhere illegal: the photo tends to be a bit of a giveaway. IK

The Photographers' Gallery, 5 & 8 Great Newport Street, London WC2. Also available in Segaworld. Call 0181 336 3356 for details of nearest booth.