› Bonus build · AI
Transformer
How a chatbot reads the words so far
A bonus build, outside the 30. Comes after #29 Neural network
Build the real thing
Next Word card game, printed on paper
Print the Next Word card game and build a sentence one word at a time: each new word is picked from the cards for the word before it, never from words still to come. A chatbot's transformer keeps the same rule, and the brick build's mask shows how.
- Cost
- $ · Under $25
- Time
- One session
- Screens
- No screen needed
Build it in bricks
210 pieces · 20 steps · Hard · parts checked September 24, 2026
Booklet: Activities Pass members now · free for email subscribers from November 19, 2026
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- Preview (free: cover, parts, step 1) →
- Other ways to get it (for grown-ups) →
Where to buy the parts
The parts lists are free. Booklet: Activities Pass members now · free for email subscribers from November 19, 2026.
Do this on a computer: you save a file here, then upload it to the store.
- BrickLink: Wanted List (XML)
Open the file in a text editor and copy all of it. On BrickLink, choose Want → Upload → BrickLink XML format, paste, verify the items, then add them to a Wanted List.
- LEGO Pick a Brick: Parts upload (CSV)
A US & Canada beta, and some parts may not be stocked. On Pick a Brick, choose Upload list, add this file, then Upload.
- BrickOwl: BrickLink XML
On BrickOwl, choose Wishlist → Import → Import BrickLink XML and upload this file.
- Rebrickable: BrickLink XML
Make a Part List on Rebrickable, choose Import/Delete Parts, then upload this file on the BrickLink XML tab.
Full parts list with part numbers (CSV)
Parts data: Rebrickable, checked September 24, 2026.
The AI ideas it connects to
Keep going: make it move
12 ESP32 Super Starter builds that live the Sense→Think→Act→Power loop from the cards — adaptations called out, same print format as the ESP32 Project Book.
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