What is the product
ManuStem is an online e-learning and robotics platform for children, fully browser-based — no software installation required, no hardware kits to purchase.

Problem Solved
Most children start learning robotics with an expensive kit: follow the instructions, see it run, but when asked "why does it run" they can't answer — because they skip the foundational step. Parents face a difficult choice: invest several million VND in a kit without knowing if their child can keep up, or let their child watch dry theoretical videos without actually touching real circuits. ManuStem fills that gap: it allows children to learn correctly from the very first lesson — understanding circuits, writing code, and seeing it run for almost no cost to start.

Main Features

1. 27 lessons across 2 pathways: Component Workshop (8 lessons — lighting LEDs, adjusting brightness, buttons, potentiometers, servos, sound sensors, reading lines, motors) and Competition Pathway (19 lessons — from stacking commands, making the robot run, following lines with sensors to handling real-world issues and competition day).
2. Real AVR chip simulation directly in the browser: the code children write is compiled and runs — LED lights, robot moves — not just illustrative videos.
3. 24/7 AI tutor: when there is a short circuit, misconnected pins, or logical code errors, the AI points out the exact mistake and suggests step-by-step corrections.
4. 3D competition arena: assemble, program, and debug autonomous robots in a simulated competitive environment.
5. Free trial without registration; unlock all for just 299,000₫ one-time fee.

Who should use it

• Children aged 8–14 who are curious about robots, have assembled Lego/kits but want to understand deeply "why does it run".
• Parents who want their children to learn STEM properly but are not ready to spend several million VND on hardware.
• Teachers and STEM centers needing teaching tools for electronics — programming independent of physical kits: any student with a laptop can learn.

How to get started
Runs on all modern browsers (Chrome, Edge, Safari) on laptops — no installation. Steps:

(1) open stem.manusignal.com,

(2) click "Start free trial",

(3) complete the first LED lighting lesson in just 5 minutes, no account needed.

To save progress and unlock all 27 lessons, log in with Google and make a one-time payment.

Key Differences

• Compared to physical kits: no hardware costs, no fear of burning boards — mistakes are immediately pointed out by the AI. And most importantly: teaches circuit thinking before assembly, instead of just assembling according to existing designs.
• Compared to video/theoretical online courses: every lesson is "hands-on" — code runs truly on a simulated chip, and mistakes are instantly visible.
• Compared to Tinkercad Circuits: complete educational pathway of 27 lessons in Vietnamese, with AI tutor addressing individual errors, and a 3D robot arena according to competition rules.