My boys (and girls) LOVE Super Hero capes. Because I had a hard time finding images that I liked, I made some, and will share them with you. It’s a PDF, and you can choose which pages you want to print. Having the their cape be their initial rather than an off the rack version makes them feel loved and special, and I encourage you to try it! Even if you have NO sewing skills, you would be surprised what even a flour-sack dish towel with the paper pinned on will do for a 3-year-old’s energy level. Good Luck and Have fun!
Also check out the Superhero cut-outs