Angel costume?

Some cardboard, paint, and glitter could be used to make wings.

White tunic for basic costume- round pattern cut from sheet,tied at waist. Wings- cut cardboard shape from 2 pcs. Tape together. Figure a place to securely put ribbon to attach to body, around arms. Next the fun part. Go to $Tree, buy a couple pkgs of coffee filters. Take a filter ,fold in half and glue to cardboard. I started at the bottom and worked left to right until covered. I did both sides. Great project to work together. Any way, one idea.

You can find angel wings and a halo at the Dollar Tree.

When my daughter was an angel, I bought some heavy white cloth and used a nightgown pattern. It's very simple. You cut the front and back, sew together at the top of the sleeves, underneath, and down the sides. Hem the sleeves and bottom. Put elastic in the neck. She loved it so much, she slept in it until it was so short it was a night shirt. It was the first thing I ever made her. Thinking about it just made me smile.

You might get lucky and find a white gown. If not and you don't want to sew, how about a man's white t-shirt and add silver glitter or some kind of sparkle all over.

wings can be made from wire hangers with panty hose stretched over the hanger. Thrift stores have a ton of Halloween costumes out right now. Very inexpensive way to go