Maybe for Charlote's Web (?) Water color crayon resist artwork, an Original watercolour painting by Kirsten Bailey, but could be adapted for a children's art activity. Great for a fall wall hanging or spider picture for the fridge!
Keyhole Paintings - Did with grade, turned out AMAZING. Draw then paint. Used oil pastels to create door and wood grain. Cut out key shape from template and wrote a sentence explaining their keyhole and attached to the bottom of the picture.