Show you know Jokers from Penguins from Riddlers at Heroes & Villains, 4533 E. Broadway, on National Batman Day, Saturday.
The comic book store will hold a Batman trivia contest with three qualifying rounds at 10:30 a.m., 11:15 a.m. and noon.
Winners will move on to the final round at 1 p.m.
The champion gets a Batman prize pack. Everyone who shows up will get a comic book.
Cosplayers from Justice League Arizona will be there to take photos with the kids.
