They lured their victims, aged nine and 11, to a ravine in Edlington in April 2009, before attacking them with bricks and dropping a sink on one boy’s head.
The hearing at Sheffield Crown Court is expected to last three days.
A BBC investigation has already revealed that the two attackers were well known troublemakers and that social services were heavily involved in their lives.
The brothers, aged 10 and 12,MBT Shoes sale, who cannot be named,ugg ultra short boots, have admitted causing grievous bodily harm with intent.
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