Each group needs:

• tape
• glue
• scissors
• Engineering Mechanized Farm Tools Handout (one per student)

Access to cheap and/or clean, recycled materials such as:

• various-sized pieces of cardboard
• straws
• toothpicks
• paper plates
• milk jugs
• foil
• paperclips
• string, twine, or yarn
• 16-ounce plastic bottles
• (optional) any other materials brought in by students
• (optional) handful of grass or other small seeds

For the entire class to share:

• 24 x 72-inch piece of green paper (one long piece or multiple sheets to create the land)
• 6 x 72-inch piece of brown paper (one long piece or multiple sheets to create the soil)
• 1 long table (for testing)
• 12 disposable paper cups
• 24 mini marshmallows
• 6 feet of rope, fishing line, or string
• 1 carabiner clip
• access to water (for testing sprayers)
• 1 laptop or tablet with a projector to show videos and images to students
• (optional) samples of Indian crops (e.g., rice, wheat, millet, maize, coffee beans, cotton, or jute twine)