I'm working on a different type of personalized Clifford pillow case, but this may look more professional:
The one request for a cake was that it would be red. I love this placemat to add a little flare to the red-only cake that "I hope we don't ruin since it seems so easy!":
And, the favors. We're a little limited here, but I was thinking something like this:
or, this for the adults (only in Clifford theme, of course):
Happy 3rd Birthday, Mr. S!