My little guys love to grab their old Halloween costumes from their costume case and play. I love it too and one day Thing 1 put on his cape and mask and Thing 2 was determined to be dressed the same while trying to steal big brother's cape. Thankfully we had a second cape, although not nearly as bright, it still did the trick.
Momentarily, Thing 1 is Thing 2's sidekick to help him get dressed.
My two little superheroes! They ran around for quite sometime with their capes and masks on. You can't see it very well, but in the background there are a lot of blankets, chairs, and a pop-up tent. They had built their fort where they would jump out and catch the bad guys.
I think the next day they decided to cuddle with their teddy bears as well as each other in the big bean bag. They giggled for the longest time, pretend to be asleep and snore and then "wake up" yelling and laughing all the while. It's times like this that being a Mommy is fun.