This is an oldie but a goodie. We did this one last year, but it was fun making a new one with friends.
We took one paper with the outline of a person on it and one paper with a hat, shirt, and overalls on it. While I cut out the person, my son colored the clothes.
My son is really into using scissors when I let him, so he cut out the overalls. Then he let me cut out the hat and the shirt. Then he glued them all on his person.
Here is his scarecrow.
Here is his friend's scarecrow (yes she likes pink).