Police say that it will cost several thousands of pounds to replace the destroyed hearing implants.
Sergeant Adam Hicklin, of the force's CID, said: 'We are appealing for help with identifying this group of bullies who launched an unprovoked and hateful attack on a defenceless young boy.
"In addition to physical injuries, the boy is very frightened and shaken and has suffered damage to his hearing aids that will cost several thousand pounds to replace."
A JustGiving page has been set-up to help the boy's parents replace his broken hearing aids.
It aims to raise £2,500 and has already raised more than £2,200.