Students will use simple materials to build their own Mini Windmills. They will learn how wind can spin blades, how pitch angle affects motion, and how rotational energy can be transferred to lift weights. Through testing and redesign, students will explore the engineering design process and apply science concepts of energy transfer.

Time Required: 45-60 minutes

Materials Needed: Each group will need: 

• Paper plate 
• Foam cylinder (hub) 
• Skewer (drive shaft) 
• Straw (bearing) 
• Duct tape 
• String (2 feet) 
• Paper cup (pre-punched with 2 holes) 
• Washer (weight) 
• Classroom shared materials: 
• Rulers 
• Scissors 
• Pencils 
• Box fan (20”x20”) 
• Alternative blade materials (cardstock, cardboard, paper cups, etc.)