My first thoughts were to avoid the obvious 'here's 3 stamps of flowers' images and try and tell more of a story, like here's a spider, he's Mr Smugface cos he's caught a fly in his trap and is about to gobble him up, but lookout, here's a bird and he's gonna devour the spider. The stamps would tell the 'story' ......spider in web, fly in web, bird. Linking them together would be the web that's in a gorse bush and the creatures are all near/in the web.
