A flower grows not because it chooses to do the act of growing, but rather because it grows.
In Taoism, when we speak about unfolding, we're talking about the natural flow of life. Acting or not acting become delicate choices where one may be going with or against the natural flow.
In some ways, allowing unfolding can be interpreted as not really acting at all because a flower does not choose to grow, it simply grows - an act, or non-act, of going with the natural way of things.
This philosophy can be similar to the idea of surrender, but it's different too. Allowing unfolding makes me reconsider any attempts to 'get baby to sleep', or eat or go potty or behave or be polite or learn or whatever else we think we're supposed to get them to do.
It's about understanding that my little Wildflower is growing and being with the natural flow of things. She is already doing what is most natural to her. It is as we age that we learn to go against the flow. I can encourage her to be a flow-er of the natural way, simply by standing back and acting less. Action without action, this is wei wu wei.