The question you will answer in this FACTivity is: What material or combination of materials creates a stronger tower? Materials: Paper Plastic Straws Wooden popsicle sticks Toothpicks Natural items (sticks, leaves, etc.) Glue Tape Paper clips Ruler/measuring tape Other items students may want to build with Graphic organizer for planning and reflection ( included ) Topics: Engineering and Forest Products, Building, Engineering, Graphic Organizer, Hands-on, Trial and Error.