Hide Keys in PVC Pipe.
This is a sneaky way to hide keys inside an old piece of PVC pipe. (credit to Sean Ragan for the idea, just helping to distribute)
Cut Your Pipe
Using a hacksaw (If you wish you can use powertools such as a table saw, but make sure you wear a good quality dust mask to protect against airborne particles) cut a length of PVC pipe to be long and shallow along the axis as shown in the picture.
Position Your Pipe
Place your pipe somewhere in the place you wish to hide it. Ideally this should be somewhere in the dirt with a slight incline so that the smaller end can be placed up the slope, as well as being near a wall or similar large object to prevent people tripping on it and discovering it isn't a pipe. It helps to disguise the pipe if leaf litter and other normal things you'd find in your yard are covering it slightly.
You're Done!
Anyone's images of the completed project, or steps taken while creating it with other tools than a hacksaw would be appreciated if they could be posted below. This is a simple instructable, but it's cheap and easy to do, as well as being useful. If you have anything you'd like me to change, feel free to comment.