I've combined two stamp sets, Gorgeous Grunge and Wetlands and I've kept to a fairly restricted colour palette with Lucky Limeade and Chocolate Chip, with some basic grey colouring on the adult goose.
The technique adds to the effect of the perspective, with the goose stamped on the uppermost card layer and the bird silhouettes stamped across the three layers.
I used a Kraft card base and have stamped the birthday greeting and another goose on the inside (should have photographed that as well I suppose). The stamping is done all in one go, after cutting the panels and placing them on top of each other. I have used narrow borders to separate the layers.
The fun part is seeing them all line up. The edges which do not stamp clearly are somehow lost to give the finished card a clear image.
These cards work well for men as they are 'different' without being too fussy.