This 13-year-old spent 300 hours 3D-printing a wheelchair for a toddler in need

Most teenagers spend summer holidays gaming or travelling. Thirteen-year-old Zac Waters from the US chose a different challenge. He spent nearly 300 hours designing and 3D-printing a customised wheelchair for a 21-month-old girl, proving that technology, kindness and determination can come together to change someone's life forever.Thirteen-year-old Zac Waters spent nearly 300 hours designing and 3D-printing a customised wheelchair for a 21-month-old girl. (Photos: Screengrabs from youtube.com/@abc4utah - AI-enhanced)Most 13-year-olds dream about how to spend their summer holidays. Zac Waters spent his dreaming up a wheelchair.The teenager from Utah in the US dedicated nearly 300 hours to designing, printing, testing and assembling a customised 3D-printed Toddler Mobility Trainer (3D TMT), a mobility chair designed for young children with disabilities, for a 21-month-old girl he had never met.By the time summer ended, he had created something that offered far more than a seat on wheels. He had built a chance for a little girl to move, play and explore more independently.A YOUTUBE HOBBY THAT FOUND A PURPOSEZac first became fascinated with 3D printing after watching YouTube videos. In an interview with ABC4Utah, he explained how like many young makers, he started by learning how machines could turn digital designs into real objects. Then he came across MakeGood, a non-profit that connects volunteers with children who need custom 3D-printed mobility devices. Instead of printing gadgets for fun, Zac signed up to create something that could genuinely improve a child's daily life. (Photo: 3d-mobility.org) EVERY DETAIL HAD A STORYThe wheelchair was anything but ordinary. Knowing pink was the toddler's favourite colour, Zac added pink accents throughout the design. He also included a removable tray table, a cupholder, adjustable headrest and footrest so the chair could grow with her.Even the straps were printed using a softer, flexible material for extra comfort, while the back had room for medical equipment if needed.For Zac, every printed piece brought him closer to the finished product."It combines my two favourite things in life: 3D printing and helping people in need. It just makes sense," he told ABC4Utah.ZAC IS PART OF A GROWING MAKER MOVEMENTWhile Zac's dedication has won hearts, he is also part of a much larger movement. Across the United States and Canada, students, teachers, hobbyists and volunteer makers are using home 3D printers to build affordable mobility trainers for children with disabilities through MakeGood's open source programme.Because the designs are freely available, anyone with the right equipment can print, assemble and customise a chair for a child in need at a fraction of the cost of conventional paediatric mobility devices.The idea has turned garages, school labs and community makerspaces into small manufacturing hubs, making assistive technology more accessible for families who often face long waiting periods and high costs. 3D-printed Toddler Mobility Trainer gallery (Screenshot from makegood.design) ONE PROJECT, THOUSANDS STILL WAITINGZac's story has struck a chord because it reminds people that meaningful innovation does not always come from giant laboratories or billion-dollar companies. Sometimes it begins in a teenager's home workshop.His wheelchair is part of MakeGood's volunteer effort, which has already delivered more than 1,000 Toddler Mobility Trainers. Yet the demand remains huge, with hundreds of requests still waiting to be fulfilled and millions of children in the United States lacking access to the mobility devices they need.For Zac, this is only the beginning. He hopes to keep sharpening his 3D printing skills and eventually work in technology. If his first major project is any indication, he has already discovered something many people spend years searching for: the best inventions are often the ones that make someone else's world a little bigger.- EndsPublished On: Aug 12, 2026 14:39 IST