I love this! totally going to use it for Art Week a the zoo! Creating fall leaf pictures is a classic craft activity that can be enjoyed by all ages. You'll find this lovely example and others at Atelier Pour Enfants.
Autumn Art: Use beautiful fall leaves as canvases for doodle designs. Press colorful finds inside a heavy book for about 10 days, then draw on them with metallic paint markers. To add a bit more strength and shine, seal the finished leaves with Mod Podge.