How would you like to convince your friends that you've got a long lost twin brother or sister? With the help of technology, you can! Set up a stills camera so that it can't move. The best way of doing this is to use a tripod. Get a friend to take a shot of you on one side of the frame, like this... ...then switch positions to the other side and get the friend to take another shot. Then cut one picture in half. If the background isn't plain, using a jagged edge when cutting helps to disguise what you're doing! Stick the half picture on top of the other and you'll get a merged photo. If you colour photocopy it you'll get one picture that looks like you have an identical twin. If you have a computer and scanner you can try using that to do the same thing. And if you've got an image manipulation package like PhotoShop you can experiment to put them together on that.