Dear Interested,
i don't use the tape in children alot, but I do use it some. It's purpose can be to stimulate the muscles under it. Or, i have used it on muscle spasms on kids traps muscles. The tendancy to keep "scrunching" the shoulders up to the neck is lessened when a ihibition tape job is done on the traps. So it is all about learning how to apply the tape right to decrease or increase activity. It depends how much you stretch it, or whether you take it from origin to incertion, or simply do a "correction" over a bursa. There are lots of courses here in Canada, so google it and look around. .
Crystal
(this is an orthopedic blog, so these children had orthopedic diagnosis)