I found the idea of this great muffin paper umbrella craft from No Time for Flashcards.
After I folded our muffin papers in half, Trip helped me glue them to the paper. He used a q-tip to make paint raindrops. We started with just blue paint, but he insisted on adding the other three colors as well.
Saying cheese :)
I added a couple of U's, then once the paint was dry, I glued on the straw handles.