Any head and shoulders that has pyrethrins.
I'm not, like, nuts over any ONE thing, but imho, to get rid of it: it's important to treat internally and externally at the same time, carefully timed and with proper substances...the squeeze effect mentioned previously. Not sure about children. No way I could recommend. You'd really need a compassionate naturopath or md familiar with your case, but I'm happy to discuss at length over the phone, esp incl. someone qualified to help you at your end.