Personally, I think you don't get it what indigo children are all about. They're not a super-race. They just have certain characteristics in common. It's like identifying someone learning disabled or with ADD, just different characteristics that add up to being indigos. Being psychic doesn't mean they can levitate others. That's a pretty specific skill and there are many kinds of psychic ability. And not all indigos have developed psychic skills, but they may be leaders and very intelligent and resistant to authority and appear to have ADD. Etc.