One interesting fact about winter for kids is that the Sun looks slightly larger because of the decreased distance between the Sun and the Earth. In December, the Northern Hemisphere tilts furthest away from the sun, which causes the drop of temperature in winter.
In the winter, the December solstice occurs when the Earth tilts on its axis at negative 23.5 degrees. It is considered the shortest day of the year. In the United States, there are only about 9.5 hours of daylight during the winter solstice. The Arctic Circle around the North Pole is in total darkness during this day.
Another fact that kids may find interesting is that snow comes in different crystal shapes. Often depicted as stellar dentrites, snow can fall in a variety of shapes, such as simple prisms, hollow columns, fernlike stellar dentrites and triangular crystals. The shape of the snow is often too small to see with the naked eye, so researchers use a snowflake photomicroscope to document the different shapes and types of snowflakes.
Winter is also the time when trees and plants stop growing. Deciduous trees shed their leaves and plants grow slowly because the days are shorter and colder. Like many animals that hibernate in winter, plants also lay dormant and hibernate during this season so they can spurt back to life in the spring.