I love finding new uses for the myriad paper towel/toilet paper rolls that I collect. This craft is perfect for the foil rolls that are too thick to cut as well. 

You will need:

An empty cardboard roll
Purple/Green paint
Paper
Green/Brown marker

Dip one open end of the tube into the paint and then print onto the paper. you should be able to make 2-3 prints before needing to redid your tube. Make concentric circles so that they resemble a bunch of grapes. When you're done, use the marker to draw a vine/branch holding the grapes together.

Ta-da!