“How to Throw a Superhero Party Worthy of ‘The Avengers’’” Invitations: Start your party off right with the perfect invitation. You can make your own postcard invitations with cardboard cut-outs of bright blue painted stars, and include the details about your party in a thin black marker. Decorate the front of each with classic comic book words like POW!, ZAP! And WAM! Décor: The Avengers bring together 6 epic superheroes. Create your own easy decorations with cardboard cutouts of spiders and paint them black, neon green head’s of The Hulk and classic American flags for Captain America and, throughout the party, use bold colored streamers, which will add some mystery to the…