For those who have everything: Zoombak

The Zoombak, a 2-ounce GPS device small enough to fit in the palm of your hand, can be attached to just about anything that might wander off—handbags, bicycles, pets. You can even “keep tabs on your children,” as the device can be easily and discreetly “stowed in a backpack.”

Price: $99.99
Contact: Zoombak.com
Source: O magazine