My 3rd graders just finished a huge project yesterday, and I couldn't wait to share. We have spend the last month or so making huge Earth and moon globes out of paper-mâché and balloons I found at a party store that are about 3' in diameter. We spent a week learning about 3-dimensional shapes like cubes, spheres...etc, two weeks covering the balloons in newspaper and paper-mâché, and the next week painting them. We split the class in half and each half worked together to complete their globe. While some students were covering the balloon, others were in charge of making mountain ranges and craters.
We hung them in the library just in time for parents to come see them during parent teacher conferences and the book fair.