For this easy Homemade Shrek Costume and His Donkey my husband wore flannel pajama bottoms, a off-white Henley, and a vest I made from a yard of cheap brown fabric from a craft store. We found green gloves for $1. Add work boots and a belt and a mask, and you have Shrek.
My husband stood at the end of the driveway and waved at traffic while waiting for our party guests to arrive. I dressed as Fiona with a costume I bought online. For families, you could add other characters from the Shrek movies. The donkey is a family pet which made Shrek characters a perfect choice for us.