I pinned a tutorial two years ago (yes, 2 years!) from The Southern Institute for making a superhero cape & cuff from an adult's t-shirt. Fast forward to a recent birthday invitation for a superhero party and I finally got around to making one.
I actually picked up the t-shirt at Goodwill so it cost me under $1.50. All other supplies for the cape and cuff I had in my stash. I purchased the blue/silver reversible mask at Target for $3 (purely a luck find as I passed through the toddler section).
My little superhero was more than excited. He had fun checking himself out in the new playroom mirror (finally got it hung!). Super D to the rescue!
Supplies: repurposed t-shirt; cotton fabric; interfacing; iron-on adhesive; velcro; Coats & Clark thread.