Keep Calm and Buy A Pony - all colors 2 Inch Square Button
This is the classic war poster "Keep Calm and Carry On" reworded to "Keep Calm and Buy A Pony". There are silhouettes of two ponies standing on the words. This design makes great presents for pony lovers/owners, as well as a funny present for just about anyone who hasn't grown out of wanting a pony.
I've put this on a purple background, but you can change that really easily. Hit 'Customize it' and then 'edit', and you'll be able to change to absolutely ANY color you prefer.