Find free clip art for kids on thekidzpage.com. Once you've found a piece of clip art you'd like to download, simply right click it and choose "Save image as..." This image can then be edited in Paint or inserted into a Microsoft Word document.
Another great source for children's clip art is mycutegraphics.com. This site features a wide selection of clip art organized into categories, making it easier to find specific types of images. In addition to clip art, they provide backgrounds, clip art frames and page borders for those wanting to add some extra flare to their clip art.