Do you look forward to the day when you can legally drive a car? Many kids do. The sense of freedom you get from slipping behind the wheel with the open road in front of you is certainly something to look forward to.

But you all know what you have to do before you can legally drive. That's right. You have to get your driver's license. That little piece of plastic with your picture on it means a whole new world opens up to you.

In addition to allowing you to legally drive, a driver's license can serve other important functions, too. One of the most important of those is identification. Your driver's license helps you prove who you say you are!

There are many different types of identification cards in the world today. Each state issues its own unique form of driver's license. States also issue birth certificates when you're born.

Federal governments issue passports. The United States government issues Social Security identification cards. Many companies also create identification cards for employees.

Identification cards obviously identify who you are. This can be important in many settings. For example, if you're a patient in a hospital, it's very important for you to be able to identify the doctors and nurses helping you.

Identification cards can also be used to control security in many situations. Identification cards can be customized to include microchips, bar codes and magnetic strips that contain information. The information can allow or restrict access to a variety of information or physical locations.

In many situations, such as cashing a check or registering to vote, it's important to be able to prove that you are who you say you are. Identification cards, especially those with your picture, allow you to prove your identity quickly.

What information is included on an identification card? In addition to your picture and full legal name, identification cards also often include various other bits of information, such as address, birth date, citizenship and a particular identification number.

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Tomorrow’s Wonder of the Day combines history and geology!