DIY Last Minute Halloween Costumes Tutorials from Willowday here and you can find the tutorials at this link. The first three are made from a recycled carton, cardboard and paper.
“Designed and sewed by Bridget Keith, age 12. Dress is from the Goodwill, cats are from her stuffed animal collection. Idea all her own.”
truebluemeandyou: Some of the best costumes are the ones that are the cheapest and simplest.
DIY Witch Hat and Cape Tutorial from Delia Creates.
rainbowsandunicornscrafts: There is also a tutorial for a child’s witch dress from the same blog here: deliacreates.com/2013/09/a-witch-dress-and-mini-long-sleeve.html
DIY Halloween Paper Doll Costume Tutorial and Templates from Spoonful here. Made with foam core and other cheap supplies, this costume could easily be converted for any age group.