They're great for adding a sentiment to the inside or outside of cards and they make perfect little 'stoppers' for easel cards too.
I've made a tag card using four of the postcards and also the very cute 'Row of Robins' stamp from the Little Claire Dinkies range which you can find here on the website. The tag card I've used is available here on the website.
Here's a close up of two of the panels:
Crafty Hazelnut's Christmas Extra Challenge - 'anything goes'
Aud Sentiments Challenge Blog - 'use any sentiment'
Simon Says Stamp - 'anything goes'
Card Mania Challenge - 'ribbon'
Crafting for All Seasons - 'tag it'
Cute Card Thursday - 'things with wings'