The Ice Bucket Challenge is well on its way to raising plenty of money for ALS research — and it’s leaving no tech exec dry. Tesla CEO and billionaire inventor Elon Musk took his turn taking a cool, refreshing ice-water bath today. Musk’s five boys, Griffin, Xavier, Damian, Saxon, and Kai got a good laugh out of dousing their father, though the contraption isn’t quite as impressive as Bill Gates’ over-engineered rig. Musk is apparently under the weather, though, so maybe he wasn’t quite up to the task of one-upping the Microsoft co-founder. Gates challenged Musk yesterday, and now Musk is passing the torch on to Johnny Depp, Tony Hawk, and Minecraft creator Notch.