Batman Themed Stampers Party Supplies - Bundle with 12 Stamps Featuring Bat Signal for Birthday Party Favors, Goodie Bags, Loot Bag Fillers, More | Batman Birthday Supplies. This Batman party supplies set includes 12 self-inking stampers, each featuring the bat signal in different colors. 3 of each style, 4 styles total. These Batman stampers are perfect to use as birthday party favors, party suppllies, goodie bag fillers, loot bag stuffers, classroom prizes, and more. Each Batman stamper is self-inking, perfect to reuse over and over when decorating for your Batman themed birthday party or creating Batman arts and crafts. Officially licensed Batman stamper 12 pack for boys and girls also includes Batman stickers and a Beach Kids superhero door hanger.