This is a great Matisse lesson to adapt for different grade levels. Give drawing lesson on table to make more 3-d? Use floral print paper for background collage. I used salt watercolor techniques to paint the fishbowl and had students collage it.
Glue resist spider web. Could get similar effect (and would be simpler with less mess) using a white crayon instead of liquid mask. For watercolor background, coat page with light coat of water, then saturate brush & drip around paper (repeat with 1-2 other colors), then swirl around w/ wet brush. Add spider at end after dry with black paint and draw legs w/ Sharpie.