LEGO Robotics

Explore & Discover

LEGO robots aren't toys — they're real machines that sense their environment and make decisions based on code you write. Start by searching YouTube for "LEGO SPIKE Prime" and "LEGO Mindstorms" to see what other kids and teams have built: robots that sort candy by color, navigate mazes, play soccer, and even climb ramps. Check out FIRST LEGO League (firstinspires.org) — there are FLL teams all over Utah, including teams competing out of Salt Lake City schools. Watch some FLL competition videos to see how seriously people take this. You don't need to own a LEGO robot set yet — just explore and figure out what kind of robot you'd most want to build. You're ready for the next step when you can name two types of sensors LEGO robots use and describe a robot challenge you'd want to tackle.

Learn the Basics

LEGO robots are programmed using block-based code that looks a lot like puzzle pieces snapping together. The free LEGO Education SPIKE app (education.lego.com) works with SPIKE Prime and SPIKE Essential sets and runs on tablets, Chromebooks, and computers. If you don't have a LEGO robot yet, use the free online simulator at Scratch.mit.edu to practice programming concepts — make a sprite move in a square, react to a button press, repeat a loop. These are the exact same ideas you'll use with a real robot. Learn three core concepts: sequences (do this, then that), loops (repeat something), and conditionals (if this happens, do that). You're ready for the next step when you can write a program with at least one loop and one conditional, and explain what each part does.

Build Your First Project

Build your first robot mission: program a robot (real or simulated) to drive a specific path — forward 30cm, turn right 90 degrees, forward 30cm, turn right again, and return to start. This sounds simple but requires you to dial in motor power and timing precisely. In LEGO SPIKE, use the "Move" blocks and experiment with the number of rotations or degrees for each segment. If you're using a real robot, put tape on the floor to mark the path and measure how close your robot gets to the target. Troubleshoot by watching what happens and adjusting one variable at a time — don't change power AND timing at once or you won't know what fixed it. You're ready for the next step when your robot completes a square path and ends within 10cm of where it started.

Experiment & Iterate

Sensors make robots smart. Experiment with the color sensor (detect a black line on white paper), the distance sensor (stop before hitting a wall), and the force sensor (react when something pushes against it). Program a line-following robot — this is a classic robotics challenge where your robot uses the color sensor to stay on a dark line without falling off. It's harder than it sounds. Try a simple version first: detect color, turn left if not on the line. Then make it smoother. Each sensor reading creates a feedback loop, which is how real self-driving cars work at a basic level. You're ready for the next step when you have a robot that can follow a curved line of tape on the floor without losing track.

Advanced Techniques

Now combine everything into an autonomous mission sequence — a robot that completes multiple tasks in order without any human touching it after the start button is pressed. Design a "course" on the floor with tape: pick up an object, deliver it to a zone, press a button, return home. Use variables in your code to store sensor readings and make smarter decisions. Learn about PID control (search "PID controller simple explanation" on YouTube) — it's the math behind smooth, precise robot movement and it's what NASA uses in rovers exploring Mars. LEGO SPIKE's Python mode lets you write text-based code if you're ready to level up beyond blocks. You're ready for the next step when your robot completes a multi-task mission autonomously from start to finish.

Final Project Showcase

Design and run your own robot competition — even if it's just you and some friends. Create a challenge course with at least three missions: something to push, a line to follow, a color to detect. Document your robot's design with photos, write out your code with comments explaining what each section does, and track your scores across multiple runs. Time your missions and try to optimize — can you shave 5 seconds off your best run? If there's a FIRST LEGO League team in your area, share what you built with them or look into joining. Post a video of your robot on YouTube or show it at school. You're ready for the next step when you've run your robot through a complete multi-mission course at least three times and can explain every part of your code to someone else.