Make your own model of the solar system! It will help you learn the order that the planets orbit around the sun.
You just made a model of the solar system! It represents the way the planets are positioned and the different sizes and colors that each one is. The planets always remain in this order; they can't change because they all have their own orbit that they constantly follow around the sun! However, this model does not show you how far apart the planets are from each other. They are so far away that you would not be able to represent the distance on a single piece of cardboard.
To learn more, use this site as a guide to make a scale model of the solar system. Even though your scale model will only be a fraction of the size of the actual solar system, it will give you a better idea of how big it really is and how much space is out there!
Here is another project: try making your own simple telescope to get a better view of the moon and stars.
What causes the different colors of the planets? Scientists have theories (guesses based on what they have seen and learned) about why a planet is a certain color, but often they don't know what causes the colors of the planets, especially the planets that are farthest away from us. Try this experiment to demonstrate one of the theories about why Mars has such a red surface.
After a few days, you should notice the sand starting to turn red. This happens because the oxygen in the water combines with the iron in the steel wool or the iron filings. This caused a chemical reaction that produced iron oxide, which is also known as rust. As you can see from your experiment, rust has a red color to it. Scientists think that the surface of Mars is red because there is iron oxide (rust) in the soil.