Although you can't always be at home to keep an eye on your child, elderly parent, or pet, you can stay connected with the power of modern technology. Install the Belkin NetCam Wi-Fi Camera on a bookshelf, bathroom counter, or atop the fridge, then monitor the space with your smartphone or tablet—any time, anywhere—using the free Netcam app. You can check in periodically to see what's happening, or choose to receive instant email notification whenever there's movement. The camera boasts not only wide-angle video and digital audio, but night vision capabilities, so you always get a clear picture, whether there are lights on or not. Available at Amazon; $80.