CyberSitter, known for their internet filter software offers the SnoopStick.

This a USB flash drive allows you to monitor what your kids or anyone using your (any) computer is doing while on the Internet. You can monitor them live, in real time, from anywhere in the world.

DragonsteelMods reviewed the recently announced SnoopStick.

Quote from the review:
"A little bit ago there was a lot of gossip, and exaggeration on quite a few websites about the product I have for review today. It is the SnoopStick from Solid Oak Software, and many people out there were saying it was for spying on people and stealing their information, well that is a bit far-fetched, and quite a bit distant from the actual truth of this product.

In the following review you will learn in detail exactly what the SnoopStick is, does and what it is really for, so continue on if you want to know the truth about the SnoopStick."
Read the full review on DragonSteelMods.

Parents, the SnoopStick is not very stealthy, do not carry it around in the open to tip of your kids.

Kids, to disable the SnoopStick monitoring, follow the removal instructions of Symantec. Via PopGadget.