If you have a fast GPU, say a GT240, 8800GT, 250GTS or GTX260 or better then you might like this. Render some voxel plancton and enjoy yourself.
Use the cursor keys and Page Up/Page Down to adjust the appearance of the plancton.
When you reach Theta=0 and Theta=180 degree range (hitting the up or down key 9 times), you will end up with the classical Mandelbulb, which is interesting especially at the higher exponents (6,7,8…)
The source code is a modified volumeRender SDK sample. It takes 500-1000ms on a GTX260 to update the bulb after a parameter change. I warned you about needing a fast GPU ;-)