I haven't, but it appears to be more involved and time consuming. The Clarke flush is actually quite simple. It takes a minute or two apiece to prepare the three drinks. You'd probably want to try it before you let your kid, but dang it's hard to imagine that coke mixed with olive oil would be easier to get down than oil mixed with grapefruit juice. The Epsom Salt drinks are nothing in lemonade. You can't taste the epsom.
The whole thing is a piece of cake really (not that the coke one wouldn't be, I assume).