You can do quick and easy fun stuff with color in Photoshop with the White Balance tool and Replace Color tool. For the former, just click the eyedropper randomly on the image and see what happens. For the latter, choose a color randomly and then change the hue to see what you get. If you feel like screwing around with weird tints and colors, this is a very simple way of doing it. We can all be Andy Warhol for 15 minutes.
Remember my photo of the chopsticks a couple of weeks ago? Here’s what it looks like with various combinations of color manipulation. The original image is at the top, followed by half a dozen false-color images.