Even if you don't have a photocopier/scanner in your home, you can still make a leaf picture/critter with your child. Teacher L and I were first inspired after reading the book "Leaf Man" by Lois Elhert to the kindergartners. The two of us bring a variety of leaves for them to choose from (and if we remember, we tell the kids to bring some, too) to make their own critter on half a sheet of copy paper. After the glue dries, Teacher L presses them and then takes them home to scan. We mat the scanned pictures and display them in the school before sending the art home.
Also, I like the idea of scanning, printing and cutting out leaves so your child can create a picture each day over the course of several days. Maybe making a book of their own, complete with a story, to give as a present.
Looking through the book "Leaf Man" (or if you can find a copy of "Look What I Did With a Leaf"), is a good way to jump start the activity. Or after collecting leaves during a leaf walk, go through the leaves together and start the process by saying something like, "this would make a good ear, head, foot (etc) for an animal".
Here's a link to more ideas: "Leaf Man" teacher guide
Here's more leaf art ideas: Leaf Prints
More autumn art ideas: Art Projects for Kids