One of my favorite little escapes that I take every now and then, and that can leave me staring at my computer for hours, is Africam. This is a site where you can go and get a peek into the African wild, without the heat, danger, or expense! There are several cameras set up in various areas and it does take some patience, although you can learn prime times to watch. I have squealed as giraffes snuck up to the cameras for a closer look, and watched lions sleepily lumbering to a watering hole after chasing prey. It is a lot of fun, and great for your kids to watch.
The cameras are on 24/7, but be warned, it can be addictive!