Wow! Lots of fun combined with lots of math, reading, and science. A perfect recipe for learning! This is one of my favorite fall Project Based Learning math activities to do with my class. The students are so busy having fun, they don't realize how much math they are learning! Students work cooperatively to make estimates about the height, weight, circumference, no. of seeds, and cost of their pumpkin at the Estimation Station. Then they will have fun finding the actual data on their pumpkins.