This site has a TON of party themes, and sells printables you can use. I especially love his vintage superhero one. Wants and Wishes: Vintage Superhero Birthday Party Collection.... Calling all Superheroes! Superhero Collection, Superhero Birthday Party, Superhero Parties, Superheroes, Parties Ideas, Super Heroes, Parties Printables, Baby Shower, Superhero Birthday Parties
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Colorful and exciting for a superhero party. I love the sound effect words with the shapes and colors it is on; goes with the super hero theme!