The Bureau of Planet Shrinking used our Reduce-a-nator on a faraway planet to create this delightful rheoscopic sphere. Rheoscopic--what? Rheoscopic fluid is a special material that shows currents. Within this planet's shell you will see kinematic viscosity in action! Visualized currents in the sphere are beautiful and ever changing. This SWORLD's shell is strong and resilient like you! So you can bounce it. Shake Twirl Bounce Calm. D: 4.00.