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.
A round looks like this
Penguin
Eating
Tacos
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.
01
Animal Doing a Verb
'Penguin · Chasing · Pizza.' Build it. Done. Worst case, it's a penguin-shaped blob with a triangle.
02
Vehicle From Another Planet
Pretend nobody on Earth has ever seen a car. Build one. Wings encouraged.
03
World's Smallest [Thing]
Tiny house. Tiny dragon. Tiny dinner party. The constraint is the size of your palm.
04
A Scene From a Dream
Three cards = the dream. Five minutes = waking up. Build the in-between.
05
The Thing You Wish Existed
A sandwich vending machine. A homework-eating robot. A bed that flies.
06
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.
New here? See how to play →