Hi I need help abt the OCD?

I think you may be overthinking this, There is a condition refered to as devolpmental arrest but many adults enjoy things that they enjoyed as a child (video games, cartoons, legos) and they are a great way to help remeber your past, but I think the best mesure of weither you are a child is your emotioal coping process and problem solving ability. If you react to problems faced by adults in a mature manner using rational thought and complex problem solving tech then you are no more than an adult who enjoys childish things. However if you react to adult problems by breaking down and crying refusing to deal with problems, using simple and inadquate problems solving tech (like those of a child) then you could be devolpmentally in a child like state. Also another judge is you level of understanding how you look at problems and your education.