Each group needs:

• 8 snap cubes (interlocking cubes); available at https://www.amazon.com/Learning-Resources-LER4285-Mathlink-Cubes-100/dp/B000URL296 or https://www.amazon.com/Learning-Resources-LER7584-Snap-Cubes/dp/B000G3LR9Y, ~$10-13 for a set of 100)
• pencil with erasers, for each student
• Blank Triangle-Dot Paper, two sheets per student
• Orographic Drawings Worksheet, one per student
• blindfold

To share with the entire class:

• (optional) computer with projector to show examples as provided in the Spatial Visualization Presentation, a PowerPoint® file; alternatively, draw the examples for students