Gather fresh leaves together. Have the children paint one side, then print that side down on paper.
You may also wish to have them make leaf rubbings with the leaves-you can make it a dual activity by using the leaves for rubbings first and then painting and printing with them afterward.
If you use large sheets of paper or newspaper roll ends (available in almost every newspaper office) the children can make wrapping paper.
Another great item to print with is an apple that is cut to show the star inside.
Printing can be done with any tempera paint.