I use to stress alot when leaving my babies home alone. I found a website that sold security cameras and bought 3. I have one in the bedroom(i activate it when I'm leaving or going to work) and one infront of the house and in the backyard. I thought it was really expensive at first but I figured not only do they give me lasting security but when I play the tapes back, I find out what my babies were doing the whole time I was out. I highly recommend it! If you guys are interested, the website's address is
http://www.webelectronics.biz/ I saw some cheap cameras at fry's electronics but they weren't proffesional grade cameras. They get broken after a couple of weeks.