Well , if ~~ you ' re ~~ he ' s a boy , he ' ll grow up until 21 to 25 so taking any drugs before that date can have a bigger impact than at adult age , but if taken cautiously and in reasonable dose for a short amount of time he may never see the bad side effects 10 u of alcohol isn ' t a reasonable dose and a week isn ' t enoughIf she ' s a girl , it ' s a bit more serious than that pre or midpuberty 1216 , can vary because both can fuck up your reproductive cells . In boys , they continually renew so it ' s not a problem . In the case of MDMA it ' s even worse , it plays with hormones levels wich can disrupt a lot of bioprocesses . In the end i can ' t recommend one or the other before 20 yo , but if you ' re willing to try and find an alternative , we can discuss