Everything in mouth

My May baby still tries to eat so many not food items such as dirt, play dough and crayons. I thought he would grow out of putting these things in his mouth. He gets extremely distressed when I try and stop him. It’s not like he plays and then tries some. If I get the play dough out he will grab it and immediately put it in his mouth and then looks for bits that have broken off to eat too. I obviously try and stop him and now I have had to get rid of crayons and play dough. There is no way he is hungry either. I’ve looked online and worried myself about something called PICA. I suppose I am wondering if anyone else’s may baby is still doing these things?