For my card I've used these naughty critters from Eat Cake Graphics:
3058-M Where the Milk and Cookies go pets
There's a great sentiment that goes with this stamp that I really must get:
8212-F Where the milk and cookies go (text)
I've coloured my image with watercolour pencils and added some sparkle to the milk, and then added clear gloss to their noses, the cookie tray and the glass.