Once the glue dries, cover the front of the craft and the back using rolls of sticky clear plastic contact. You can also just slide the picture placemat inside a plastic sleeve used in office clip folders. Then just sticky tape closed the open end of the plastic sleeve, to enclose it securely. This will make them waterproof and easy to wipe down after each meal.
Computer programs work with image data in a number of different ways, for example programs like CorelDraw work with both Vector images (lines) and Bitmap images (pixels), CorelDraw is also the preferred program for making rubber stamps from images.
I take the clipart and then print it out in various sizes for how I want to use it. I can drop it off at the cake decorator's so that she can make me a cake with that pattern. Then, I email a copy to my husband's work so that he can print out a few copies in a larger format. These become cut outs that I place on the walls... almost like a logo.