A 14-year-old in a Colorado farm town built a robotic hand from LEGO bricks, fishing line and surgical tubing, then met a 7-year-old at a science fair wearing an $80,000 prosthetic arm she had already outgrown — his next version, 3D-printed, came in under $400, and NASA took him on as an intern at 17
A 12-year-old in California built a Braille printer from a $350 Lego robotics kit for a school science fair, at a time when the cheapest commercial machine cost about $2,000, and Intel invested in it