Here is one of my favourite ideas from the original Minions post. Now with the extra Minion films that have come out we could make either the normal yellow minions or the Purple evil minions. These hats are super easy and all the supplies to make them should be really easy to find either online or at your local hobby store. I found everything at my local Hobbycraft shop.
What you need
Yellow Foam Visors
Black Craft Foam, roughly 1 sheet
per three hats
Big googly eyes
Black pipe cleaners for hair
Cut out thin strips of black foam into goggle shapes, stick the big goggly eyes in place on the black foam making goggles. Make sure you make some with one eye and some with two eyes.
Glue the goggles onto the yellow visors, making sure the visors are up-side down. Poke the pipe cleaners through the top of the visors for hair.