And You Are …?

I’m not actually sure what flower this is, but it is pretty and a prolific spreader (think, low maintenance).  I think others would call that a weed.  It doesn’t stay where it is supposed to; often taking over the parts of the yard outside the flower bed.  It is the one flower that I have given permission for the neighbor kid to pick as many as he wants.

Any ideas as to what it is?

To see last week’s view, click here.