Painting is always a good creativity booster. Cut an apple in half to make a star. Stick a fork in the top. Dip it in the paint and stamp circles with stars in the middle. Take a leaf that is still malleable and dip it in the paint to make leaf stamps. You could turn the apple circles into pumpkins if you draw a brown stem on the top. Get creative!
You could also make a bird feeder with an old toilet paper roll. Punch two holes across the top to thread yarn across the top for hanging. Spread glue all over the outside of the roll and then roll in bird seed. Lisa, I have extra bird seed I could drop off at your house if you want to do it.
Go on a small walk finding cool stuff like sticks, leaves, bark etc. and glue them on a paper to make a nature collage.