Perhaps the single most important thing to do, if you wish to extirpate the creative impulse, is to remove joy and spontaneity.   Replace that flush of love that makes somebody dance with a formula to master that will allow them to know exactly where the beat is that they are dancing on.   When dealing with a young person, crushing, or perverting, a love of creativity is fairly easily done.   Take something like singing, which most people like to do and do quite naturally.   

Form a group of children, call it The Singer’s Group.  Make them sit quietly while you tell them all about the joy of singing, the history of human song, the mammalian love of vocalizing going back to the songs of the whale and before.   Then, tell them what they will sing and instruct them, note by note, pausing to point out wherever they have overstayed a dotted half note. 

By this procedure you will find out two things: which children are most anxious to please their teachers and their parents, and which are most hellbent on being creative at any price.   

It’s just me, probably, but I would infinitely prefer to play in a room full of the second kind of child.