Each group needs:

• 1 container, reusable plastic containers or Tupperware works well, see Figures 8 through 10 for an example.
• 5 100-gram weights, such as weights that are typically used with science balances found in the classroom
• 10 cm x 10 cm squares of fabric of different materials such as wool, silk, flannel, jersey t-shirt material, etc. Easy examples include socks, bandanas and foam drink holders that can be folded or cut up, see Figure 2.
• duct tape

To share with the entire class:

• measuring tape or meter sticks
• testing device made of hammer and string (see Figures 3 -7)