Have You Ever Started A Jigsaw Puzzle,

then realised the board you are using is too small? 

well that is not likely to happen with a range of mini puzzles like this one that comes in a test tube, and when finished measures just 10cm X 15cm,

but be warned the manufacture states, 'this is a real challenge even for the cleverest people in the house' difficulty level - hard, this particular one Big Ben, is one of many miniature puzzles available, but for all sorts of fun things have a look here at the londji site, a great site and no I am not on commission, I just thought it was a neat puzzle and a great shop.