When 8-year-old Zoeya Khan was tasked with engineering a project that brings a creative solution to the world, she designed ...
Plus: Stopping asteroids from hitting Earth, solving climate change with fertilizer and building strength by eating grapes.
Plus: Bringing astronauts back from the ISS, fixing hearts with space-grown cells, why your kids need to touch grass and more.
But what exactly should a prototype look like? First, it depends on your idea. Second, it depends on your budget and your goals. If possible, it's great to start with a handmade prototype ...