Courtesy of my boys, cut a tube from a leg of a pair of jeans.
Then cut 2 arm holes in the left and right top.
Cut straight down the front to create the vest.
Add Star Shaped KAM Snap Caps and Sockets to left side and Caps and Studs to the right side. I spaced them every 2".
Tada! Easy Peasy!!! OR....
... In his down time, he is also a super hero. :P I used an extra burp cloth and a couple snaps, one day a long while ago, to cheer up a little boy :).