All kids like burying things, especially if they have the option of digging said things up later. That's why this Underground Time Capsule is so great. Not only is it designed to go underground and hide precious objects for later retrieval, but it makes the whole process easier by having a screw-on rock at the top, allowing you to add new items without digging it up.

Of course, it's not watertight, so you probably don't want to put a stack of $20 bills down there, but for a little kid looking to hide his action figure collection, this is pretty great.

Via Boing Boing Gadgets