There were numerous suicide bombings by children during the second intifada, and more attempts that weren't successful.
This year, some of the "children" killed in the May war were identified as members of Hamas and other groups.
It continues this year, as the Islamic Jihad and Hamas summer camps are in full session and they are proudly publishing their photos.
Hamas:
Islamic Jihad seems to prefer to train their children while they inhale smoke from burning tires.
Yet the world media and human rights NGOs are silent. There is nothing about Hamas or Islamic Jihad on HRW's Child Soldiers page or UNICEF's site on the topic.
Here's another case of the "Palestine exception," where Palestinian terrorists get away with doing things that others get condemned for.