Each group needs:

• 15-20 extra large, heavy paperclips
• 6-7 6-inch rubber bands OR, make a 6-10-inch chain of 10-15 smaller rubber bands
• 3 identical hardcover books about one-half-inch thick; such as math books, encyclopedias, dictionaries
• 1 yardstick
• masking tape; share a roll among all groups
• Physics Tug of War! Worksheet, one per student