Marvel Potty Training Stickers Bundle - Over 295 Avengers Reward Stickers for Toddlers Featuring Thor, Iron Man, Black Widow, More | Avengers Party Favors. Fill up your little one's potty training chart with these Marvel Avengers reward stickers! Each sticker comes in various sizes and colors. Includes 4 sticker sheets and over 295 Avengers stickers to choose from featuring Iron Man, Hulk, Thor, Black Widow, and more! Also great for Avengers reward charts, motivational stickers, party supplies, or just for fun! Officially licensed Marvel Avengers potty stickers bundle.