You can create your own certificate by visiting a website, such as certificatemagic.com, that offers the desired certificate template. From there, you can select a template and the desired printing option.
The website certificatemagic.com offers a set of themes from which you can choose. Themes include formal, sports, kids and fun. After choosing a theme, you can view the associated certificates for it. Certificatemagic.com allows you to personalize the document by adding a title, achievement and recipient information.
Another site offering unique certificates is 123certificates.com. This site has a variety of certificates for several different occasions, such as art, baseball, bowling, camping and other events. After choosing an occasion, you can view an associated certificate and print it as an image.