Review the background topics. Subjects such as math and science are necessary for engineering, and teaching children about these subjects is necessary for understanding engineering.
Teach them the basics. Explain, in simple terms, what engineering is and how it is used. Use examples to which they can relate, such as roller coasters, toys and games. Give examples whenever possible, and show them pictures if you think it will help. Explain how other subjects, like math, are related to the subject.
Purchase a book. Websites, such as Biglearning.com have lists of books that you can use to teach children about engineering. These books were written specifically for children, and should be easier for them to understand than more advanced texts. After selecting a book, you should be able to find it through online and offline retailers or through a website.
Use the Internet. The Internet has several resources available that can help your child learn about engineering. Websites, such as Discover Engineering, have detailed explanations about engineering professions, as well as fun games and activities that utilize the principles of engineering.
Demonstrate the principles of engineering through fun activities. Children may not want to sit through a lecture, so instead, try giving them a hands-on display of engineering. For example, if you want to teach children about stress, have them build a bridge out of popsicle sticks and glue. Then place weights on the bridge to see how well it holds up to stress. If you are teaching several children, turn it into a competition with a prize for the child that builds the sturdiest bridge.
Speak to your child's teacher directly, if you are a parent. Explain that you think the students could benefit from learning the basics about engineering. You may find this easier, if you have some example ideas or activities that you can suggest to the teacher.