Each student needs:

• a pair of identical, rectangular cardboard boxes; ask students to bring these from home, thus it is unlikely that any students will bring in the exact same box types; boxes that work well are small- or medium-sized product packaging boxes from cereal, crackers and pasta, macaroni and cheese, pudding, cake mix, hot chocolate, tea, instant oatmeal packets, computer diskettes, contact lens solutions, toothpaste
• sturdy scissors
• metric ruler
• large envelope or zipper-style plastic bag (such as quart or gallon sizes)
• large paper clip
• Instructions for Students Handout

To share with the entire class:

• masking tape, several rolls
• transparent tape, several rolls