Engineering Design for Kids: Plan, Build, Test, Improve (Grades 3 to 5 Science)

Hi, I'm Luna from DoodleBeez. Engineers solve problems by designing things, like bridges, phones and playgrounds. They follow a plan called the engineering design process. Let's learn the steps.

Step one is to define the problem. What needs to be solved? Then list the criteria, which are what the design must do. And list the constraints, which are the limits, like time, money or materials.

Here is a problem. Design a bridge from paper and tape that holds ten pennies across a gap. The criteria are holding ten pennies. The constraints are only paper and tape, and twenty minutes.

Step two is to brainstorm. Think of many possible solutions, even wild ones. Then compare them and choose the idea that best meets the criteria and constraints.

Step three is to build a prototype, which is a first model of your design. Then test it fairly. Change only one thing at a time, so you know what made the difference.

Step four is to improve. Look at the results. Where did it fail? Make changes and test again. Engineers repeat this many times. Each failure teaches something useful.

Now it's your turn. Your paper bridge sagged and held only four pennies. What should you do next? Pause and try. Find where it failed, improve the design, maybe by folding the paper for strength, and test again.

Great job! Remember, engineers define the problem, brainstorm, build and test a prototype, then improve it again and again. Practice engineering design in the Science Lab at doodlebeez.com. See you next time!