I would email her and tell her the box of goodies will be on your porch this Saturday. If the box is not picked up between xx - xx then items will be donated/thrown out.
Or, if you don't want them on your property again, email you will drop off items at a certain time convient to you and leave on their front stoop.
This is something that can be added to our policies. All items not picked up within 48 hrs shall become the property of the daycare.