leanvine labs

Ulsan, South Korea · Est. May 2026

AI learning kits,
with Claude inside.

We make hands-on kits that teach how AI really works: a prompt-engineering card game, and MimiClaw, a device that lets learners test their prompts against Claude.

Explore our kits Get in touch

Leanvine Labs · AI learning kits

AI Prompt Recipe package concept
Package concept

Our learning kits

A little play. A lot to explore.

Order card Role card — Persona Setting Technique card — Chain of Thought Constraint card — Token Limit Secret Spice card — Prompt Hacking

AI Prompt Recipe

Card game · Printing in 2026

Learn prompt engineering through a card game. Combine your cards to write a prompt; players take turns judging each other’s prompts.

  • 135 cards
  • 3–5 players
  • About 30 min
  • Ages 12+

For upper elementary students through adults.

Order 30 / Role 30 / Technique 30 / Constraint 30 / Secret Spice 15

MimiClaw — AI device concept illustration / AI 디바이스 콘셉트 일러스트

MimiClaw

Prototype

Write a prompt. See what a real AI says. An ESP32-S3-based AI learning device with a TFT LCD, in a case we design and 3D-print ourselves.

  • ESP32-S3
  • Claude API
  • 3D-printed case

After a round, learners enter the card combination they chose. MimiClaw sends it to the Claude API and shows Claude's actual answer and its reasoning on screen, so students compare it with their own.

Currently in the prototype stage.

Where we're going

From prompt cards to Physical AI.

  1. Cards

    Available 2026

    AI Prompt Recipe: learn prompt structure by hand.

  2. Check

    Prototype

    MimiClaw: test the chosen prompt against Claude on a real device.

  3. Act

    In development

    MimiClaw Physical AI (next version): prompts designed with the cards drive a small device's real-world motion, so learners see a prompt turn into action.

From a learner's first prompt to a maker's Physical AI project, in one product line.

How we use Claude

In the learning.
In the making.

Claude is inside our kits and behind how we build them.

  1. 01
    Claude API · MimiClaw

    The real AI learners check their prompts against, and the model that will plan device actions in the Physical AI version.

  2. 02
    Claude Code · Firmware & tools

    We build MimiClaw firmware and our card and curriculum tools with Claude Code.

  3. 03
    Claude · Curriculum

    Lesson plans and classroom materials for our kits.

Recognition

Growing in Ulsan.

2026 Ulsan Startup U-Series (U-Start)

Selected for the program · Ulsan Economic Promotion Agency

Our team

Educators. Designers. Engineers.

Juhyun Oh

Founder & CEO

Planning, design, and education.

Bachelor’s degree in Psychology.

Five years running a children’s art education business, including AI-powered art classes.

K.J. Lee

Engineering Lead

PhD candidate in Industrial Engineering, University of Ulsan.

Former researcher in biotechnology, UNIST.

11 years in embedded systems, IoT, AI, and web.

What we do

Also from our team

AI Education

AI learning for children, students, and teachers. Our founder brings five years of running a children’s art education business, including AI-powered art classes.

Software Development

Software development services using AI tools including Claude Code. Our work includes a vending machine management system in 2026.