3000 pagers exploded. All had small amounts of explosive like 20 g. You can watch videos of them exploding in traffic, supermarkets, etc. people next to them remain unharmed. So you have 3000 explosions all over the place including crowded areas. Two dead children is a quota of 1500:1. That is exceptionally good.
Compare that to the Hezbollah rocket than killed 11 Druze children in Israel.
The bombs are small. People in the vicinity are not harmed. You can see videos of them exploding in supermarkets and on streets. The only one injured is the owner of the pager.
Compare to the 11 Druze children in Israel Hezbollah killed recently.