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
Psychiatrist showed "disregard for the fundamental tenets of the medical profession" having sexual relationship with a vulnerable patient
Man with connections to Moss Side gangs jailed after pleading guilty to drug and firearms offences
Abdullahi Ahmed Jama Farah acted as a communications conduit for a group of men who travelled abroad to commit acts of terrorism