# Heirloom

- **Event:** [Gemini 4 Argon SF Hackathon](https://cerebralvalley.ai/e/gemini-4-argon-sf)
- **When:** Sun, Oct 25 at 9:00 AM – 10:00 PM (PDT)
- **Where:** San Francisco, CA
- **Team:** [Leia Anapaula Chavarria-Davila](https://cerebralvalley.ai/u/leiaanapaula)
- **GitHub:** https://github.com/LeiaAnapaula/heirloom
- **Demo video:** https://www.loom.com/share/2ce67619a6214919bac2270e00a1fd6f
- **Gallery:** https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/127

Heirloom turns a grandparent's stories into a 3D world their grandchild can explore and build in. Grandpa tells a story: a memory, a dream, or something he makes up. That story becomes an explorable world. The child adds something of their own, like a bridge, a garden or a treehouse, and names it. A warm message goes back to Grandpa ("Leia built a bridge to your village!"), and his reply becomes the next story.

The problem: many children are lonely and hooked on fast rewards, and many grandparents are lonely too. Heirloom turns a phone call into a place they share. It isn't a game with levels or streaks, and it isn't an AI friend. The only reward is the person on the other side answering. The learning happens inside the building: counting the planks, reading the sign, naming what you made, including in Grandpa's own language.

Heirloom grows out of The Primer, our working AI storybook for children ages 4 to 6. It reads aloud, listens while the child reads, has a magic pencil for tracing letters, adapts each lesson to the child's skills, and has parent accounts with consent. It has 357 unit tests. Today we added the Argon World Builder and the first Heirloom world: a Marble 3D world at the center, with the child's build-and-reply loop around it.

## More from Gemini 4 Argon SF Hackathon

- [Two Lenses](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/1)
- [Argon Guard](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/2)
- [Agent Gym](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/124)
- [Argon Music](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/125)
- [Bot18](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/126)
- [Infinite Peaks](https://cerebralvalley.ai/e/gemini-4-argon-sf/hackathon/gallery/128)

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