The planet Mars is the fourth planet from the Sun in the Solar system. And, it is the second smallest planet in the Solar system. The planet Mars is almost similar to Earth. A day on Mars planet is slightly longer than a day on Earth. This article teaches you about the facts of mars for kids . Here some of the important facts of Mars for kids . Planet Mars 1. Earth and planet Mars both have white polar caps. The polar caps on Mars are smaller and thinner than polar caps on Earth. The polar caps grow rapidly during the winter season and disappear in the summer season. The polar caps on Mars are much colder than the polar caps on Earth, so they contain frozen carbon dioxide it means which is used to create fog on stage shows and during functions. 2. The planet Mars is generally known as “the red planet” in the Solar system. The reddish color of the mars planet comes from the high amounts of iron oxide. ...