devices for recording child language

[Kristina de Korsak]

I am recording three siblings (ages: 14 months, 3 years, 6 years) in  
a variety of spontaneous contexts. I was wondering if anyone had any  
suggestions about what type of equipment to purchase as mine is very  
outdated. My focus is not on phonology, although it seems a shame to  
compromise on recording quality. It could be compatible with Mac or  
PC (or even integrated into a Mac or PC). Ideally, I would like  
something I can set up with a cordless micro splitter and let run  
discretely while they play (in various rooms). If at all possible, I  
was hoping to find something that will record video too, but with a  
decent sound capability in order to make sure I at least have the  
audio track available if they leave the pictureframe. I have not had  
much luck finding what I am looking for on my own. Does anyone have  
any suggestions?

Kristina de Korsak