From my notebook...

Fall Leaf Mobile

Using a cereal box or other thin, flexible cardboard, cut a one-inch wide, eighteen-inch long (or so) strip. Tape it in a circle and punch six holes in the strip.

Have the children collect colorful fall leaves on a nature walk. After they've been collected, press them between pieces of wax paper. Punch a hole in the wax paper leaves and tie them with string of various lengths. Tie the string to the holes you punched in the circular strip.