For sensitive sista's or one's with very fine hair (I have both), child perms are different in that they take longer to 'burn' the scalp. People with sensitive scalps are not always able to leave the relaxer in long enough to be thoroughly effective because it starts burning/irritating before the time is up and sometimes, before I get a chance to do my whole head. The child relaxers tend to be able to be left on longer before this burning even begins or without this burning effect at all.
Sometimes, the problem isn't sensitive scalp, but that even the regular relaxer over-processes very fine hair. In this case, the child perms tend to be gentler. I of course, have both issues.
I know some people whose hair is just hard to straighten so they leave the kiddy perm in longer than recommended but it does well, their hair doesn't seem to be damaged AND the scalp doesn't get burned (I DON'T RECOMMEND THIS EVER, JUST TELLING WHAT 2 PERSONAL FRIENDS OF MINE DO - SO IF YOU CHOOSE TO DO SO, IT'S AT YOUR OWN RISK).
Botanicals for sensitive scalp is an excellent adult relaxer for sensitive scalp/fine hair issues, I like the results and have never been disappointed. Must admit though, I buy whatever is on sale when my pockets aren't right but I pay for this dearly so i try my best not to (OUCH!)
Edited by sbj1104 - Oct 14 2009 at 2:34pm