T.K.
Do what they do on the show - have a Blues Clues mystery. Put blue paw print clues around for them to solve. You can also do the Mailbox thing. Go to the website and see if there are printables - coloring pages or games you can print as favors. There may be a pin the ear on blue or something. You could make you own with a picture and some velcro. Sing the same songs they do on the show. Have blue Koolaid instead of punch.