Collect leaves make sure they are all dry. Melt down some old candle stubs, then take the leaves by the stem immerse them, one at a time, in the wax. Hold them over the pot to drip a bit, then lay them on waxed paper. See http://patchodirtfarm.blogspot.co.uk/2008/11/what-to-do-with-all-those-pretty-leaves.html for more details (“,)
Also on these boards
Hanging Leaves~ Colorful leaves Bleached beeswax Double boiler Monofilament Clothespins Slowly melt bleached beeswax over a double boiler; never allow wax to boil. Dip leaves in wax one at a time, holding by stem. gently shake off excess wax. Some may be dipped again, depending on desired look; let dry between coatings.
Quirky/Fall-vintage'y kids art - have child write "Fall" in box at bottom of old book page. If child isn't writing, ask him/her to cut & paste a word and have them try to write it underneath.