Kano, a UK startup that makes build-your-own-computer kits for kids, just raised $28 million (£21 million) in funding. It's using the cash to fund a massive retail expansion in North America. The company is inspired by a challenge from the cofounder's 6-year-old cousin. LONDON — Back in 2012, six-year-old Micah Klein gave his cousin Alex a challenge: "I want to make my own computer, but it has to be as simple and fun as Lego." Fast-forward five years, and Alex Klein is CEO of Kano, a London-based startup that makes build-your-own computer kits for kids and people learning to code.