I'm getting quite concerned about my 6 year old who has recently (last few months) started putting everything in their mouth. He was always a bit grabby over food but now it's everything, from salt cellars on tables to staples.
I am really at a loss as to what's causing it as when asked he says that he doesn't know why he does it.
I've also asked if there is anything worrying him but he says no.
His behaviour in school isn't great, low level stuff like not listening/doing as he's told etc. but it is constant. The teacher says that he's very intelligent and when doing an activity of interest his attention never waivers but also unsure what triggers some of the poor behaviour.
He has also started making random noises which we thought was as a result of copying a classmate but now I'm not so sure.
I'm really at a loss over what could be causing this and what to do do would appreciate any advice.