Need data set for student analysis

[Fay Wouk]

Hi. I'd appreciate some advice as to what out of the vast amount of  
data in Childes would be good data sets to use for the term paper I  
want to assign my students.

What I want is a longitudinal study of a single child, covering a  
period of several months, going from the two-word stage well into  
multiword (say an MLU of about 3), that comes with sound files and  
ideally also with video. It could be any variety of English (the  
students are mostly New Zealanders or second language speakers of  
English).

Can anyone recommend a good set of files to use?

thanks,
Fay