Colorizing Eyes
This tutorial was made for Photoshop Elements 6, but can easilly be done with other versions.
Step 1: First you have to find an image you want to use. Here's mine:
Step 2: Now zoom in on one of the eyes and use the
Polygonal Lasso Tool, which looks like this:

, to mark all around the eye. Once you've clicked your way all around the object, double click to complete the marking.
Step 3: Go to
Enhance >> Adjust Color >> Color Variations. A new window will appear and here you can choose the color you like the most. There are different settings you can change to get other colors.
Step 4: Then do the same to the other eye and you're done. Here's my finished result: