Sometimes I find it hard to tell what is official Blues Clues merchandise and what isn’t. I’ve found that larger chain retailers tend to carry party supplies that are officially licensed. With the long-standing popularity of Blue Clues, there is also a lot of unofficial merchandise. ETSY is one option if you are okay with purchasing from small businesses that might not have official merchandise. You can usually find much more variety there, but they will have generic names like “blue dog” and “magenta dog” to describe their products.