So my little brother is three and hes very healthy. but for some reason today he has been eating anything he knows he shouldn't. He ate crayons,tip of eraser, water color paint, pinecone, chunk of table, paper and has been biting his nails and fingers. I know he wasnt hungry cause we offered him food each time and he didn't want it but he would go put other non food things in his mouth. Could this be something serious like pica or could fetal alcohol syndrome (his dad had it) or is it just him being a kid. My mom doesn't think it serious but I'm not sure.