Wear an aqua blue top. To really get your costume looking right, try to get an aqua-blue hooded sweatshirt, t-shirt, or tank-top to turn into your Rainbow Dash costume. You don't really need to do anything to the shirt to make a costume out of it, just make sure it's the right color.
Kraft Vegemite Yeast Spread is a dark brown Australian food paste made from leftover brewers' yeast extract with various vegetable and spice additives developed by Cyril P. Callister in Melbourne, Victoria, in 1922.
http://michellegrigsby.net In case you are curious what vegemite taste like...it's pretty salty. I describe it as a very salty paste of chicken and beef bouillon into one. It is high in B1, B2, B3 vitamins and folate.