If you don't fancy doing Darwin's jigsaw you could always relax with a pear. We often eat kiwi fruits but the bird from New Zealand is a different shape.
|New Zealand Kiwi|
A number of countries have diamond shaped stamps like this from Angola:
I included a Mongolian stamp when I posted Olympic stamps earlier; they seem to favour the diamond shape.
You will see that a triangular bird stamp was also included along with the Olympic stamp. I showed a set of triangular stamps from the Camerouns before when the topic was flowers so I won't repeat them here.
Perhaps those of you in the USA can tell me what these heart shaped stamps were for.
The stamps that caught my eye as a boy all came from Hungary; it took me ages to find out what Magyar Posta meant.
Scanning and and cropping these stamps has been an interesting exercise but for more entertaining stamps ckeck out Viridian's Sunday Stamps 32