How can an engineer design a bird feeder that attracts many birds? This question resulted from kindergarten students' observations of the bird feeders in their school's bird sanctuary. The challenging question is the heart of project-based learning (PBL), a teaching strategy in which students tackle real-world problems and design projects to solve them. This question drives the learning from beginning to end, giving the students a focus for the end product. The creation of a public product motivates the learner, provides a springboard for discussing learning, and is a tool for students to use to share their learning with others. It is also a very powerful assessment of student learning. Creating the bird feeders as a public product was the driving force in the STEAM/PBL project discussed in this article. The materials, lessons, and activities outlined in the article are just one step toward reaching the performance expectations listed in the included chart: Connecting to the "Next Generation Science Standards" (NGSS Lead States 2013): K-LS1 From Molecules to Organisms: Structures and Processes.