Inflate a rubber balloon in the browser and run the two-balloon experiment. The Mooney-Rivlin thin-shell pressure curve is solved in closed form, so the famous counterintuitive result becomes a theorem with an exact boundary. An independent reimplementation of published physics (Merritt & Weinhaus, Am. J. Phys. 46, 1978); blowing up balloons is in the public domain. Runs entirely client-side: no model, no credits.

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.