If you are looking for some clever ideas how to add fun effects to photos, then you should take a look this really simple yet clever diy camera trick. They are so easy, and you can diy in less than an hour.
A practical guide for those who love photography, but find it to be Greek :) Here is comparison chart so you can see what each aperture looked like. Knowing what your aperture will give you helps a lot when it comes to visualizing a shot.
Experimenting with the shutter speed is the best way to determine the correct shutter/aperture combination for your situation. In this case, the version doesn't imply enough motion to be effective; the & versions are better.