Figure out how much time you have to work. You'll need to balance time to finish your project and don't wait until the last minute. Estimate the required time that you need to finish the costumes. Some costumes have small and complicated parts, requiring more work and more time. Other costumes require large pieces that are not complicated to do. Give yourself reasonable time. Try at least four weeks to finish the costume. If four weeks isn't enough, feel free to extend the time given.
what halloween costume is all black
^ Cleene, Marcel. Compendium of Symbolic and Ritual Plants in Europe. Man & Culture, 2002. p.108. Quote: "Soul cakes were small cakes baked as food for the deceased or offered for the salvation of their souls. They were therefore offered at funerals and feasts of the dead, laid on graves, or given to the poor as representatives of the dead. The baking of these soul cakes is a universal practice".
This one is so easy, it hurts. Everyone in the group needs the most stereotypical "vacation shirt" they can find, and that's it. For extra laughs, you can wear fanny packs, high socks, visors, sunglasses, and other vacation-themed goodness. There's a good chance you already have some of these items on hand, but if not, head to the dollar or party store. A dollop of sunscreen on your nose doesn't hurt, too. Grab a pair of binoculars, point at everything, and most importantly, have fun.
If a couple dozen Marvel films weren't enough for you, we have good news. There isn't a better place to look when you need to find a group of 5 Halloween costumes that will scratch your superpowered itch. All you need to decide is which Avengers character everyone will be! Remember, whosoever is worthy gets to become Thor. And if you can't decide who gets to dress as Iron Man, you can take comfort in the fact that Stark has a lot of different suits to pick!