For investigating hydrophobicity:

• printer
• glue sticks
• hydrophobic sand, available online
• instant snow, available online

Waterproofing materials:

• beeswax
• aloe vera gel
• cocoa butter
• wax
• crayons
• flaxseed oil
• lanolin
• clay
• glue
• spoons or sticks for smoothing materials onto surface

Tools to modify surface roughness:

• sandpaper
• wax paper

Surfaces to modify: (Depending on their target user, students will choose appropriate material)

• 10 cm x 10 cm piece of flat wood or 10 cm x 10 cm cotton fabric

Materials to simulate dirt:

• glitter
• pepper

Materials to observe drop profile/contact angle:

• hand lens
• camera or camera phone

Materials to test roll off angle:

• plastic clipboard
• protractor
• masking tape or duct tape
• small container of water
• pipette or eyedroppers
• paper towels
• sink
• buckets or small bins to catch water during testing

Materials to test self-cleaning ability:

• scale
• 50 ml graduated cylinder

Materials for posters:

• large poster board or butcher paper
• markers