Himself that is, not other children (luckily). Picked my 2.5 year old grandson up from nursery yesterday and was told he’d had a lovely time but he’d been biting his knuckles when excited. His knuckles were bright red with his teeth marks still in them. He continued to bite himself occasionally throughout the afternoon at home. He is autistic and was wondering if anyone could advise me on whether this is some kind of stim and if there are any good alternatives out there for him to chow down on. I had a quick look last night and came across some necklaces and bracelets, but not sure how safe they would be considering he’s biting so hard.