Out of LEGO ideas? Let three random cards decide.
Fast Brix! flips a 3-card prompt and a 5-minute timer. No instructions. No staring at the bin. Just build the weird thing.
App store links coming soon
A round looks like this
6 starter prompts when the bin is staring back
Pick one, set a 5-minute timer, start building. Or just let the app deal you 3 cards.
Animal Doing a Verb
'Penguin · Chasing · Pizza.' Build it. Done. Worst case, it's a penguin-shaped blob with a triangle.
Vehicle From Another Planet
Pretend nobody on Earth has ever seen a car. Build one. Wings encouraged.
World's Smallest [Thing]
Tiny house. Tiny dragon. Tiny dinner party. The constraint is the size of your palm.
A Scene From a Dream
Three cards = the dream. Five minutes = waking up. Build the in-between.
The Thing You Wish Existed
A sandwich vending machine. A homework-eating robot. A bed that flies.
The Reveal Build
Build something, then make up what the 3 cards were. Family guesses. Hilarity.
Frequently asked
- What can I build with random LEGO bricks?
- Anything a 3-card prompt tells you to. Fast Brix! deals three random words (like 'Octopus · Chasing · Forks') and you build that scene in 5 minutes with whatever bricks you have. The pile of mismatched pieces is the point.
- What should I build if I'm out of ideas?
- Stop trying to think of one. Let the deck pick. Three random cards + a 5-minute timer beats staring at the bin every time.
- What can a 7-year-old build with LEGO without instructions?
- A penguin eating tacos. A robot riding a snail. Whatever three random cards tell them. The constraint removes the blank-page problem — they start building immediately.
- Are random LEGO builds actually fun, or just chaos?
- They're chaos, which is what makes them fun. The build doesn't have to look good — it has to answer the prompt before the timer runs out. The reveal is the payoff.
- Do you need a specific LEGO set?
- No. A Classic bin, leftover Technic, the random mystery pile under the couch — all fine. Fewer 'right' pieces forces more creative building.
The bricks are waiting.
Fast Brix! is free. Deal three cards.
App store links coming soon
New here? See how to play →