Kids Voice Tutor
A Cantonese AI tutor on a compact ESP32 voice device, helping primary pupils with dictation, maths and daily life
A compact voice device built on the ESP32 chip that gives Hong Kong primary pupils a Cantonese-speaking study buddy. The child just talks to it to practise dictation and maths, ask about typhoon signals or the next bus, and take a daily news quiz. Parents set up the device, word lists, grade and tools from a web console.
What it does01
- Runs on a compact ESP32 voice device with a microphone, speaker and Wi-Fi, so the child learns by talking, with no tablet or phone needed
- Reads out the week's dictation words, records results and revisits the ones the child got wrong
- Sets maths questions at the child's grade, checks the answers and tracks progress
- Answers 'Is school suspended?' using live typhoon signals, weather warnings and current weather
- Tells the child when the next bus, MTR train or ferry is due at their saved stops
- Runs a daily current-affairs quiz built from government news headlines
- Lets parents add up to five practice quizzes, reviewed by our team before they go live
- Gives each child their own device and AI profile, which parents set up and pair from the web console
Example conversation02
Illustrative example
Human vs agent03
Same taskDaily dictation and maths practice at home
≈ 35 minstaff time
- Read out each dictation word, then mark the answers
- Set and check maths questions at the right level
- Note the mistakes to revise next time
≈ 5 minstaff time
- Child practises by talking to the voice device
- It reads the words, sets sums and checks answers
- You update word lists and check results online
No screen needed; the child just talks
Saves ≈ 86% of staff time
Estimates for one typical task, based on how the workflow runs. Actual results vary.
Ad-hoc AI vs our agent workflow04
The same task, done by prompting a general chatbot by hand versus through the agent’s set workflow.
Tokens per task
Right first time
- Word list and grade typed in every session
- Chatbot maths answers are not always right
- The child would need a phone or tablet
Tokens per task
Right first time
- Words and grade come from the parent's saved lists
- Maths answers are checked by code, not guessed
- Missed words are saved and come back for review
No AI is 100% reliable. When a run fails, the agent retries automatically or hands it to a person.
Estimates for one typical task, based on how the workflow runs. Actual results vary.
How it works05
- Step 1
The child speaks to the ESP32 voice device
- Step 2
The device streams the voice over Wi-Fi to the cloud AI
- Step 3
The AI picks the right tool and checks the child's lists, grade or live public data
- Step 4
The device speaks a short Cantonese reply
- Step 5
Results are saved for parents to see in the web console
Why it's trustworthy06
- Only the subjects and tools parents switch on are available
- Child-safe prompts and short, age-appropriate replies
- Parent-made quizzes are reviewed before children see them
- Each parent sees and manages only their own child's settings
- A dedicated learning device with no web browser, app store or ads
Good for07
- Parents who want daily dictation and maths practice at home
- Tutoring centres and schools offering a home-learning companion
- Education brands building their own low-cost voice device for Hong Kong families
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