The goal of this activity is for students to explore how three addends can create a sum of ten. This is a fun, Thanksgiving-themed math activity. Students are told that there is a class of 10 children putting on a Thanksgiving play. Each child must be assigned a costume: either a Native American, pilgrim, or turkey. Through this activity, students decide how many of each costume to use. They then write their expression, demonstrating how many of each costume together create a sum of 10. This is an open-ended question, and students can also reflect on the process, using sentence starters to help them write down how they solved this math investigation.