Firstly, I'm sorry, but I am not a language expert, so please don't be too judgemental of this quetion.
Secondly, I understand that my question is not probably not very clear but basically, I am interested in the way that children develop language. I work in a nursery setting, catering to 2-4 year old children. It always interests me when I listen to the children talking, especially regarding how they compensate not being able to pronounce certain parts of words, for sounds that they are able to make. A good example being today, when I heard a child say "Fway doh" instead of "Play doh", another child pronounces "Skip" as "Gip".
This will probably be a stupid question but can you think of any other sounds that children compensate real word sounds with?
And also, why is it that children are unable to pronounce certain sounds, but they later develop the ability to do so?