If you do not have a toy camera, here's a useful tip. Bring a lot of film on your trip and a good old camera like OM1. Get on an airplane. Take a bunch of pictures. When packing your bags for returning back home, be sure that your exposed film is in the baggage that you take to the check in desk! Not with the hand luggage. If you are lucky the pictures will be thoroughly X-rayed and look grainy, overexposed and blurry.
Quite nice sometimes. In fact I will post this picture (Spain,2009) in our new section 591XP which means experiment, expression, expansion, exponent, explicit...you should join too! - Mr Urbano