Design and build a model city with this Geometry City STEM project for Grades 4–7. This 3D design challenge explores area, volume, and geometry through a hands-on, CCSS-aligned PBL activity that connects math to real-world engineering.Students will apply geometric concepts to plan structures, calculate area and volume, and design functional city layouts. Through modeling, measurement, and structured worksheets, learners develop spatial reasoning and problem-solving skills in a practical context