Get a red sweater hoodie and some paper. With the paper cut out 2 3s and and glue to the hoodie. My pastor did this at my church yesterday.
Get a dry erase marker and a white t shirt. Write: error 404... costume not found. It is HILARIOUS.
Cut holes out of a white bed sheet and throw it over yourself. Easy peasy ghost costume!
Blow up a bunch of purple balloons and stick them on your clothes and throw on a green accesory of some kind for some grapes.
Take a plaid top, some jeans and a sun hat and then paint your face like a scarecrow to complete.
Use a pillowcase or paper bag if you don't have a cheap 50 cent Halloween bucket.