Gotta try this: Acrylic paint (enamel works even better, but it's more expensive) on a few smooth rocks. So pretty!
Sweet little metal box full of... mouses! Starting from this diagram of Mmmcrafts, you will be able to build from felt and fabric this house to hosting some small rodents that your children may carry wherever they want. Moreover, it would be a great corner to save their first loose teeth and change them to the Tooth Fairy for small treasures.
Transferring images to marble or rocks...villabarnes: Playing With Rocks
villabarnes: Playing With Rocks