These days, parenting means navigating a seemingly endless parade of decisions about technology. Can your toddler watch "Sesame Street" on an iPad? Does FaceTiming the grandparents count toward screen time? Should your teen have access to social media just because "everyone else" seems to? Parents are more cognizant than ever about the pitfalls — and potential — of technology, so it's natural to wonder how the people leading tech companies handle this with their own kids. Paypal cofounder Peter