The Stress box explores the forces that push, pull, and overwhelm. Each object reveals how materials and organisms respond when physical tension builds—and what happens when it’s finally released.

The Stress box contains these items and an info card:

• Giant Rubber Band: Stretching this loop applies tensile stress—a pulling force that stores energy in its elastic structure. When released, that stress is rapidly converted into motion, making the rubber band a simple, striking example of stored mechanical force.
• Carolina Reaper Seeds: These seeds hold one of the world’s most intense natural defenses: capsaicin. When planted, they grow into peppers engineered by evolution to trigger stress responses in anything that dares bite. A living lesson in biological survival.
• Liquid Thickener: This powder can transform liquids into non-Newtonian fluids—materials that resist flow when stirred or squeezed. It responds to shear stress, showing how everyday substances can behave in surprisingly complex ways under pressure.

Mini Matter is the smaller version of our Matter subscription box. These kits explore the stuff that makes up our world (and beyond) through surprising connections. Shop the full collection here.