For the entire class to share:

• laptop computer/Chromebook (one per group would be ideal, but a shared one would be sufficient.)
• handheld digital microscope (available here). Teachers could alternatively use other types of microscopes. (One per group would be ideal, but a shared one would be sufficient.)
• various materials for surfaces (cardboard, textile, foam, wood, packaging material, etc.) and sliding pucks (plastic bottle caps)
• various  grit sandpaper (available here)
• different particulate solids such as sand, corn starch, breadcrumbs, different types of flour, etc.
• rubber bands
• ruler or measuring tape
• markers
• scissors and/or cardboard cutters
• glue gun and glue sticks
• other adhesives such as white glue, clear tape, and/or masking tape