Larry wasn’t what you would call a “hands-on dad.” Sure, he could barbecue with the best of them and assemble IKEA furniture—not without some questionable leftover screws, but still—he shied away from things that required delicate manipulation, like Rosie’s math homework or, heaven forbid, repairing electronic toys. He was meant to get his paws dirty with sputtering car engines, dig into artificial monoliths and get their gears turning again, not dai...