This unit of 7 related activities is centered on the issue of single-use plastic bags. It takes K-2 students on a journey of investigation and evaluation to find a more sustainable alternative. The set of activities ends with designing their own alternative to single use plastic bags. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ or send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA. For permission beyond the scope of this license please contact Charlene Sequeira at charlenesequeira@gmail.com