Science- Seasons unit idea: looking out the window. Kids trace their hands on to brown paper, stick on to blue paper, which is then stuck on to black cardstock. Decorate the tree hands accordingly. This would make an ideal buddy craft.
Celery flower art is another great Mother's Day idea or just a simple art project for the classroom. I think the idea of using food to create art would be an interesting project to bring to the classroom and have students work with and experiment with.