The machine is not much to look at. It sits in a modest innovation lab near the Kenya Railway Museum in Nairobi, humming as it pulls a thin string of recycled plastic through a heated nozzle. The string feeds into a 3D printer and, slowly, layer by layer, becomes the body of a remote-control car.
The plastic came from a water bottle. Someone picked it up off a street nearby.
By the end of three days, a teenager who has never touched a circuit board will have built that car almost entirely from recycled material. They will understand how to design its parts, wire its electronics, and write the code that makes it move. The bottle, the filament, the car, the lesson. Nothing wasted.
This is ChipuRobo. And what looks like a workshop is really a bet that Africa does not need to import its future.
Born on two stacked tables
ChipuRobo was started around 2022 by four young people in a one-bedroom apartment. The name comes from two Swahili and robotics roots: "chipukizi," meaning a tender young bud, the kind that pushes through soil before anyone has thought to water it, and "robo," for robotics.
Kevin Irungu, 31, is the oldest of the four and the technical backbone. A software engineer who has been writing code professionally since the age of fifteen, he co-founded the company and leads its STEM training programmes. David Ndung'u, 27, manages financial strategy and keeps the bootstrapped venture solvent through reinvestment. Jeffery Ngui, also 27, studied International Business Administration and taught himself marketing along the way; he drives ChipuRobo's outreach, getting the team into schools and forging partnerships. The youngest is Cindy Gachuhi, 23, a computer science graduate of Strathmore University whose eye for technology integration shapes how the company builds and delivers its programmes.
Together, they average 27 years of age and are building something that universities, corporates, and government programmes have not managed to. Irungu had spent years watching Kenya's brightest graduates walk out of university, some with first-class honours, and fail to get hired. He saw the gap up close when he observed that candidates being considered for roles at the Microsoft Africa Development Centre in Westlands were not failing because they lacked knowledge. They were failing because they could not translate what they knew into a conversation that made a recruiter say yes.
A brown learning board for STEM Learners interested in robotics, assemebled AI powered remote controller and toy car made from 3D-printed recycled plastic parts at ChipuRobo headquarters in the Nairobi Railway Museum residence.
Photo credit: Kimani Mwangi | Nation Media Group
"You have a first-class honours degree," he says, "but you are not able to convince a Microsoft hiring manager to give you a job because you don't know how to translate your knowledge into a CV, into a conversation where the other person can see your value."
The frustration became fuel. Irungu began brainstorming with Ndung'u and Ngui in his bedsitter room, which they converted into a makeshift lab. Two tables. One power socket. One 3D printer that Irungu had bought for roughly Sh55,000, a sum that required him to sell his phone first.
Evenings became sessions. What do learners in Kenya actually need? How can technology education reach people without costing a fortune? And how could the raw materials, the filament that feeds a 3D printer, typically a commercially imported roll at roughly Ksh3,500 per kilogram, be replaced with something available right outside the front door?
The machine that eats bottles
What makes ChipuRobo unusual is not just that it teaches robotics to young people. It is that the learning materials, the cars, the drones, the robotic arms, are manufactured during the learning process, from recycled single-use plastic.
The team developed a custom recycling machine, 3D-printing its plastic parts in their apartment, sourcing locally available acrylic and plywood, and modifying their printer's nozzle from brass to hardened steel to handle the higher temperatures that bottle plastic requires. Plastic bottles are collected from the community, inflated with air, fed through a blade that cuts them into long strips, and then pulled through a nozzle that extrudes them into usable filament. The colour of the final print depends on the bottle: blue bottles print blue parts, colourless bottles print transparent.
"From this water bottle, we get this filament," Ndung'u says. "And from this filament, we 3D print the parts for everything you see here."
Nothing is thrown away. Imperfect prints and scrap pieces are stored for a future crushing machine that will allow the team to reprocess even their own waste. The goal, Ndung'u says, is zero waste and eventually scaling up to handle tonnes of plastic per month.
Cindy Gachuhi joined ChipuRobo after finishing high school in 2021, during the tail end of COVID-19. Before enrolling at Strathmore, she completed a Moringa School data science cohort at eighteen, the youngest person in a programme of working professionals. "It was like four years of a data science course compressed into six months," she says. "Everyone else had more experience. I was playing catch-up the whole time."
Between Moringa and Strathmore, she volunteered at a public primary school near her estate. What she found there has shaped ChipuRobo's entire approach.
"I walked into that school and I realised everything was on paper. The tablets were not working. I asked the students if they had ever touched a computer. They had no idea about any of these things. And these kids are supposed to be applying for the same jobs one day as their counterparts in private and international schools."
The numbers behind that observation are stark. As of December 2024, only 21 per cent of teachers in public junior secondary schools were trained in STEM learning areas, and 35 per cent of public schools had no STEM teacher at all. Only 48 percent of learners in public junior schools had access to laboratory facilities. Kenya's new Competency-Based Curriculum places heavy emphasis on STEM, but the laboratory gap remains severe. As of early 2026, the government had pledged to build 1,600 laboratories but students in most public schools were still waiting for practical learning to begin.
ChipuRobo's response is deliberate. They prioritise public schools. They do not charge students to attend their sessions or use the lab. Gachuhi says that is why she stayed.
What three days looks like
The curriculum is built around a simple principle: a student should never just be told how something works. They should make it.
A typical three-day bootcamp begins with 3D printing. Students learn how a digital design file becomes a physical object. By day two, they have their printed parts and begin combining them with electronics, learning about wiring, power management, and circuits. By day three, the components come together into a functional product — a remote-control car, a drone, a robotic arm — that the student has built almost entirely from recycled plastic.
"It looks like a toy," Ndung'u says, holding up one of the small cars. "But it is not. It is a learning material. By the time a child finishes this, they know how to 3D print, how to design parts, how to manage batteries and electrical principles, how to do wiring, and how to programme the remote and the car."
Students are divided into groups with roles mirroring a real engineering team: mechanical, electrical, software. Points are awarded for collaboration, not just output. The products are tiered by age: simpler kits for primary school children as young as seven, more advanced mechanisms for university students. Their most recent bootcamp included a Grade 3 student and a Grade 11 student working in the same session.
Microsoft, Nairobi School, and what comes next
The team's work has attracted institutional attention. In November 2025, ChipuRobo partnered with the Microsoft Africa Development Centre and eKitabu to run Bootcamp III, an immersive workshop on AI, robotics, and digital fabrication hosted at the Microsoft ADC premises in Nairobi. Students assembled and built the PET recycling machine as part of their learning. The programme continues in 2026, with participants preparing for the Kenya Science and Engineering Fair.
Among ChipuRobo's mentees are three students from Nairobi School who first encountered the team at one of the Microsoft-hosted bootcamps. After attending two cohorts, the students began visiting the Railway Museum lab independently, working on their own projects. ChipuRobo gave them free access. In December, those students registered a company.
"We gave them space and tools," Irungu says. "No charge, no supervision. Just space and tools."
David Ndung’u operates an AI-powered toy car made from 3D-printed recycled plastic parts on April 24, 2026, at ChipuRobo headquarters in the Nairobi Railway Museum residence.
Photo credit: Kimani Mwangi | Nation Media Group
None of this has come cheaply. ChipuRobo is fully bootstrapped. Irungu funds his share from his software engineering income. Ndung'u draws from a farm in Laikipia. Ngui from savings. When they needed to attend the national science congress in Garissa, they had to figure out how to move a team and their equipment across the country with limited funds. Getting to schools in Bungoma requires the same calculation every time.
Their attitude toward regulation is direct. "If you put speed, innovation, and regulation on one side and the other," Irungu says, "we chose speed and innovation. Anyone who wants to regulate us will find us on our way. We will not stop to find them."
Ngui goes further. He is frustrated by what he sees as a broader credibility problem in Kenya's youth innovation space. "There is a lot of misinformation in this industry," he says. "Guys saying what they are not doing. Getting funding, upgrading their lifestyles and calling it a project. It's making people lose trust in everyone." ChipuRobo's response has been to stay on the ground, document results, and let the students speak.
The car on the table was a water bottle three days ago. The teenager who built it had never held a soldering iron before. Gachuhi watches from across the room.
"We are not putting anything down their throats," she says. "We just want to see the success stories."
