My son is quite retinentive about if we say something and we don't follow up with it he will have a paddy. When it comes to drawing or writing if he makes an error he will lose it and destroy his work. School has introduced the invisible circle so adults cannot see the error etc but wondered if this type of perfectionism could be a sign of special needs that we need to look at. He used to put all his trains in a row but less so now - not much sign of OCD repeated behaviours just losing it with not getting things correct the first time....is this normal? Thanks.