Think of everywhere clipart can be used in your restaurant: menu, cups, napkins, table toppers, newspaper ads, flyers, coupons, television commercials, door hangers, signage, window clings, temporary tattoos, coloring books, doggie bags, flags, banners, receipts, letterheads, business cards, refrigerator magnets, postcards and much more. Each and every one of these is an opportunity to build your brand and consistency is the key. The clipart elements you choose should have a consistent look so they reinforce each other and the brand you're building.
For example, a parent might include the image of a Baby Jesus on each of the items that will be covered in December or a Easter bunny on items to be covered in Spring. Parents may use blank labels and print our their own custom stickers for this purpose using any of the free LDS clipart resources online.
So before you download clipart off the internet, you need to determine what kind you need. For the classroom and basic computer programs such as Word, you most likely just need to get royalty-free raster clipart. If you need to use a high tech computer and software with a vinyl cutter, laser, or CNC then you need a vector clipart graphic. Either way you should use royalty-free clipart to be legal for commercial and other activities.