Note how AFP reported on the deaths:
The bodies of two Palestinian boys Yahya Ramadan Ghazal, 12, and his cousin Mahmud Mussa Ghazal, 10, is seen in the morgue of the Kamal Radwan hospital in the northern Gaza Strip town of Beit Lahiya. Israeli fire killed the two Palestinian boys and wounded two of their cousins, nine-year-old Sarah Suleiman Ghazal, who was critically wounded, and a fourth child who suffered less serious injuries as they played in a field in the northern Gaza Strip at the tail end of their summer holidays.(AFP/Mahmud Hams)
The two children were sent to retrieve the rocket launchers.
The media did the rest.
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It looks like Hamas is starting to make this a regular thing.