First find a picture you want to edit.
Then go to www.picnik.com
Then upload your photo and go click on the 'create' tab then go to the 'effects tab'.
To make a color splash first make the picture black and white, but don't apply it yet.
Then click on the part you want to be in color.
You can also control how 'hard' you want to color to be. Just mess around with the setting.
Then just mess around with all the effects until you come up with something you like
For this one I messed around with the Boost.
For this one I used Invert.
For this one I messed with the Cross Process.
For this pic I made it black&white, messed with the Boost, and added the Vignette (which is the black border around it)