There was a round ball invented for little children with rubber cones on it and it vibrates.Anybody with a name for this ball also took 4 Batterys as want to see if can buy one for my German Shepherd as he looks bored.Might have to modify it a bit if rips into full force or not if he can not chew while vibrating

Bumble Ball. I think the core part of the rubber bits are solid plastic though, so if your dog manages to chew them off, they might possibly cut their gums.

Thanks been looking on ebay and there all plastic and cheap thin things.I purchased one for one of my children and it use to shake the childs face off sitting in the high chair while trying to maul the rubber.But if any chance the dog gets hurts i will pass and buy him a big thick leather ball instead