Tourette-t-t-ts?

Cameron has been repeating the final consonant sound of several words the last couple days. I am sure he's just learning to enunciate his words and manipulate sounds. In the mean time it is unique and interesting to watch, for example, he says milk-k-k-k, or boot-t-t-t-t. It could be occurring because I have been emphasizing the correct pronunciation lately of the words 'fork' and 'fox' to get him to stop swearing. I wonder what's going on in his mind. Whatever it is, it makes me laugh-f-f-f-f!