Each group needs:

• LEGO MINDSTORMS NXT robot, such as the NXT Base Set (5003402) for $159.98 at https://shop.education.lego.com/legoed/en-US/catalog/product.jsp?productId=5003402&   isSimpleSearch=false&ProductLine=NXT
• LEGO MINDSTORMS Education NXT Software 2.1, available as a single license (2000080) for $39.97 or a site license (5003413) for $271.96 at https://shop.education.lego.com/legoed/en-US/catalog/product.jsp?productId=prod120017&isSimpleSearch=false&ProductLine=LEGO+MINDSTORMS+Education+NXT
• computer, loaded with NXT 2.1 software
• LEGO MINDSTORMS NXT Intelligent brick (in addition to the one provided in the kit above), part # 9841, available for $169.99 at http://shop.lego.com/en-US/NXT-Intelligent-Brick-9841?CMP=AFC-BP6648365778&HQS=9841
• calculator
• ruler
• mini marshmallow
• piece of Play-Doh (about the same size as a mini marshmallow)
• piece of foam (such as Styrofoam, about the same size as a mini marshmallow)
• piece of bread (about the same size as a mini marshmallow)
• Deformation: Foam Compression Worksheet, one per student