S.B.
Hi L.,
it is good to encourage your daughter to help others. What group is she doing the service project for and what organization will benefit from her actions and the donations?? What items is she trying to collect? All of this information should be conveyed to potential donors. Maybe the service group members could also support her efforts or the organization to benefit could help her spread the word.
Walmart is one of the few stores that you can ask for permission to set up a table outside for such a project. but it is up to the individual manager. With the holidays approaching, there are already a lot of organized efforts. (salvation army, toys for tots)
One idea might be to visit people having garage sales and offer to pick up items that are not purchased that could be donated. A lot of people forget to call a charity pick up in advance, so after the sale they may have stuff to donate instead of hauling it back into the house. Good luck to you and your daughter!