If you feel like having real fun, turning to Mother Nature is the best way to go. And if you want to cheer up a good friend or have a good laugh with your classmates, consider postcard printing with the following natural humor ideas:
I can’t imagine a better day than the one when sky smiles to us!
The platypus – half beaver, half duck – is the classic example of the Nature’s perfect sense of humor. I always thought that nose just doesn’t belong there.

This funny apple seems to have a nose and a smoking pipe. I can’t believe the photographer ate this funny man! (by Frowser).

The Happy Spider found only in Hawaii literally makes everyone who sees it happy. Really hardly can I remember any other spider that makes people smile.

This tree with two eyes and a mouth actually looks angry and pissed off. But despite that, it does makes me smile.
