The owl sillouetted against an orange harvest moon is a very effective use of a stencil, and a fun craft for the kids to try. Younger children will need help cutting out the fiddly owl template, or you can do it for them in advance.
Create a washed background with watery paint and then make your harvest moon stand out against it with this homemade "puffy paint" technique. The result is a lovely, textural piece of art!
This is an interesting way to create a truly stunning picture of the harvest moon against a sunset sky, using tissue paper strips. Even the youngest children will enjoy doing this, or you could have a younger child make the moon while an older child creates the background.