Meaning of "for grins"
What does for grins mean in the following?
If the web service says the values are valid, the underlying fields are updated. If it says the values are invalid, it sets up error messages for the fields. For grins, on an invalid return, it also validates the level number itself.
"For grins" is typically used as another way of saying "for amusement purposes".
A more common English expression is "for fun." Not for a serious purpose.
Also, "for laughs," or "for kicks."