Firefighters found this onion bomb hidden in bushes in Salford near where the boys were injured.
They've confiscated it and are warning of the dangers of fireworks.
Onion bombs aren't meant to be available to the public.
More top news
Police investigating Paul Groom murder want to trace these passengers on a bus that Paul travelled on a few days prior to his death.
A mainly dry week. Breezier from Wednesday
Officers investigating a homophobic attack on a man in Oldham have released CCTV images.