Red Cup STEM Challenge for Kids - these simple STEM challenges are perfect for kids of all ages and use things like red cups that you already have at home. Tons of fun with science, tech, engineering and math from Kids Activities Blog!
Painting on foil--add dish soap to paint to help it stick. This would be a new idea in my classroom. I would embellish the project by having my students take portions of the foil and engrave designs on them, or rub textures onto the surface. That would make something interesting. Perhaps there is a Christmas project in there somewhere.