“Make Your Own Periscope” has been added to your cart. View cart Sale! $13.00 Original price was: $13.00.$10.00Current price is: $10.00. Learn about the forces of gravity while making art at the same time! Make your own painting pendulum! In stock Make Your Own Painting Pendulum quantity Add to cart Related products Klean Kanteen 16oz Rise Tumbler $25.00 Add to cart Dual Pencil Sharpener $14.00 Add to cart Crystal Wand $10.00 Add to cart Lucet Braiding Fork $11.50 Add to cart