If you don't mind my asking, those grenades you made for the Bakugou cosplay looked fantastic, and I was just wondering how you made them.
I used .5cm EVA foam for the grenades. You can buy them in rolls or in square pieces. I buy mine from Big5Sporting Goods but I’ve found them in Sears, Walmart, Kmart, and Big-lots.
With the grenades I decided to make the squares first; there are 6 in a single ring. I like to make the patterns for the shapes on cardstock paper so that all the shapes are sure to be the same.
Imagine making strips of these squares until you have the right amount. Then you fill the inbetween with more foam. Look at a wooden barrel, the build was similar to that.