As suggested, I emailed a couple of contact to check into the zapping of young children. One responded this morning to say...
Yes you can zap also children. It doesn't hurt.
Maybe best to use the gel-pads.
Good quality zappers you can find here: http://www.drclark.com
Cordially,
Dr. Clark Information Center
Can the gelpads be used with the ZP zapper? Where do you buy gelpads?