Fast Brix! in the STEAM classroom: a 5-minute LEGO challenge that supports NGSS engineering practices
By Gary Kosman · · 4 min read
This one made our week. A STEAM elementary teacher left Fast Brix! a 5-star review on the Google Play Store — and in a few sentences opened up our eyes to a world we really hadn't considered!
"As a STEAM elementary teacher, I am so excited to implement Fast Brix in the classroom. The app gives students a creative building challenge using whatever random LEGO or other bricks they have available, so no two creations are ever the same. Fast Brix naturally supports NGSS engineering practices…"
Why Fast Brix! fits the STEAM classroom
Fast Brix! is a five-minute LEGO building game. The app deals three silly words — a noun, a verb, and a noun — and starts a timer. Students build whatever those three words mean to them, using whatever bricks are on the table. When the timer dings, they share what they made. That's the whole game.
It's simple on purpose. That simplicity is what makes it work in a classroom: no kits to buy, no instructions to lose, no "right answer" for a kid to get wrong. Every student's build is different, which turns the share-out into the best part of the lesson.
How Fast Brix! supports NGSS engineering practices
The Next Generation Science Standards include eight Science & Engineering Practices. A single five-minute round of Fast Brix! naturally touches several of them:
- Defining problems. "Penguin · Eating · Tacos" is an open-ended prompt. Students have to decide what the problem actually is before they can start building.
- Developing and using models. A brick build is a physical model of an idea. Students choose which features to represent and which to leave out.
- Designing solutions under constraints. Five minutes. Whatever bricks are in the bin. That's the constraint set — same as real engineering.
- Constructing explanations. The share-out is where the science lives: "Why did you use the wheels for the taco? What would you change with more time?"
- Communicating information. Students explain their build to peers — vocabulary, cause-and-effect, tradeoffs.
A 5-minute classroom lesson plan
- 1. Dump the bin. Any classroom brick collection works — LEGO Classic, Duplo, Mega Bloks, off-brand. Mix is fine.
- 2. Draw the cards. Open Fast Brix!, set the timer, and reveal your cards. Project the three words on the board.
- 3. Build (5 min). Students build individually or in pairs.
- 4. Share (5–10 min). Each student shows their build and answers: What did the words mean to you? What did you have to leave out?
- 5. Reflect. Optional exit ticket: "What's one thing you'd change with more bricks or more time?"
Great for morning meetings, indoor recess, and STEAM stations
Because a round is only five minutes, Fast Brix! slots into transitions and buffer time as easily as full lessons. Some ideas:
- Morning meetings and soft starts
- Indoor recess on rainy or smoky days
- STEAM stations and maker-space rotations
- Early finishers and "brain break" moments
- Sub-day activities that don't need prep
Free for teachers
Fast Brix! is free on iPhone and Android. No student accounts, no ads, no in-app purchases. If you're a teacher trying it in your classroom, we would love to hear from you — reach out on our contact page and tell us how it goes.
Huge thank-you to the STEAM teacher who left that review — you made a 10-year-old game designer's whole week.