Michael and Susan Dell announced Tuesday that they have committed $6.25 billion to fund investment accounts for some 25 million American children. The couple’s donation will be the largest ever devoted to American children, according to Invest America, a nonprofit advocacy group partnered with the Dells. “It’s designed to help families feel supported from the start and encourage them to keep saving as their children grow,” Michael Dell, founder and CEO of Dell Technologies , told CNBC in an interview. “We know that when children have accounts like this, they’re much more likely to graduate from high school, from college,...