After we saw these hand decorated mugs over on A Beautiful Mess I know we would have to give it a try. All it takes is a light coloured mug (or plate - I see some funny face plates in our future!!), Sharpies and an oven!
Here's Michelangelo at work - I love his casual posture! He covered the whole mug in multicoloured scribbles (the best kind!) then we baked in at 180degrees for half an hour. I haven't washed ours yet, but the original post says it will hold up to a handwashing.
Our mug is a present for Vin's nanny, but I think any kid would be tickled to have their own set of tabelware, or you could do this as an activity at a birthday tea party and the kids take home their creations as favours!