Build-a-Mover
You have learned so much about how robots move! You know about wheels, legs, and tracks. You know about robot arms and grippers. You know about motors, balancing, force, and avoiding obstacles. Now it is YOUR turn to be the engineer! In this lesson, you are going to design a robot — choose a job for it, then decide exactly how it will move to get that job done.
Thinking Like an Engineer
Real robot engineers do not just start building. They ask questions first. What does the robot need to do? Where will it work? What does it need to pick up or move? How much space does it have? Who will be nearby? Every answer shapes the design. A robot that works in a hospital around people needs different movement features than a robot that works alone in an outdoor field. A robot that lifts heavy machine parts needs different arms than a robot that carefully moves fragile artworks in a museum. The best engineers think very carefully about the job before choosing any parts. They explore different options. They imagine problems that might come up. And then they make thoughtful decisions — explaining why each choice makes sense for that specific job. That is exactly what you are going to do right now!
Never design a robot without thinking about the job first. The job tells you everything: what kind of movement is needed, how much force, how careful the robot must be, and what environment it will work in.
Here are some job ideas to spark your imagination. Pick one of these, or make up your own! Robot lifeguard — patrols a beach and rushes to help swimmers in trouble. Robot librarian — moves through library shelves, finding books and delivering them to readers. Robot gardener — plants seeds, waters plants, and harvests vegetables. Robot school helper — carries lunches from the cafeteria to classrooms. Robot explorer — explores deep inside a cave to map it and look for interesting rocks. Robot pet companion — walks around the house with a pet, making sure it has water and is safe. Any job works! The stranger and more interesting, the better.
Think about the environment where your robot will work. Smooth floors? Outdoor terrain? Water? Crowded spaces with people? The environment is one of the biggest clues to what kind of movement your robot needs.
Design Your Mover Robot
- Get a large piece of paper (or tape two pieces together) and something to draw and write with. You are about to design your robot!
- STEP 1 — Choose the job.
- Write the name of your robot's job at the top of the paper. For example: Robot Gardener.
- STEP 2 — Choose how it travels.
- Will your robot use wheels, tracks, legs — or a combination? Draw your robot's base and label it. Write one sentence explaining why this travel method fits the job and the environment.
- STEP 3 — Design the arms.
- Does your robot need arms? If so, how many? How many joints do the arms have? What is at the end of each arm — a gripper, a tool, fingers? Draw the arms and label the joints. Write one sentence explaining what the arms need to do.
- STEP 4 — Think about force.
- Will your robot need to be gentle, strong, or both? Write down at least one thing it must handle gently and one thing it needs to handle with strength. Explain how the robot will know how hard to press.
- STEP 5 — Plan for obstacles.
- What obstacles might be in your robot's environment? (People? Rocks? Other robots? Narrow doorways?) Write down two obstacles and explain what sensor or strategy your robot will use to avoid them.
- STEP 6 — Name your robot!
- Give it a great name. Write it at the top of your design.
- STEP 7 — Share it!
- Show your design to someone and explain all five choices you made. Can they think of a problem your robot might run into that you have not solved yet?
When you share your design, you might find that someone asks a question you had not thought of. That is perfect! Real engineers get that all the time. The questions help you improve your design. Maybe someone asks: how does the robot get back to its charging spot? Or what happens if the robot's arm is too short to reach something? Or what if it rains? These kinds of questions are called design challenges — problems that need solutions. Every great robot went through many rounds of asking questions, finding problems, and improving the design before it was built. You just did the first round of that process. That makes you a real robotics engineer — at least at the start!
Real engineering always starts with exactly what you just did: think about the job, make choices, and explain your reasons. Every robot you see in the real world started as a drawing on someone's paper — just like yours.
A robot engineer is designing a robot to water plants in a greenhouse. The floor is flat concrete and the plants are on shelves at different heights. What should the engineer think about FIRST?
You designed a robot gardener. A friend asks: what happens if a child runs in front of it? This question is called what?