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.
Complex drawing and illustrations can also be made into rubber stamps; these may not contain many lines and look more like photographs. It is best to send a few different options of these to your stamp manufacturer; one option would be to increase the brightness of the image then convert the bitmap to a simple black and white image. Here it is best to select a rubber stamp manufacturer that is familiar with these types of images, see below recommendations.
To find the wealth of scrapbooking freebies out there online, just do a simple Google search for 'free scrapbook graphics' or 'free clip art'. There are many other search terms to use that will reveal to you the different scrapbooking freebies you can find. You can get entire scrapbook themes with all of the free matching clip art, borders and fonts that you can use in just about any scrapbook.