#ToteChallenge: Young people investigate the problems caused by plastic shopping bags, then propose solutions they can take to address the problems. They brainstorm uses for plastic bags. This lesson gives guidelines to design a reusable shopping tote out of an old T-shirt using engineering, problem-solving, creativity, and communication. They take action for the common good by using and sharing their project and by educating the community about problems and solutions to the plastic bag crisis.