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
Following a successful first year in 2016, Liverpool's Ice Festival is back at the Pier Head - and it looks spectacular.
A mum has spoken of her anger after her teenage son was injured after allegedly being assaulted in the street by a trio of thugs.
Frank Bruno has donated a signed golden glove worth £250 in a bid to help replace stolen cash from a poppy tin.