Build a sandcastle on a real wet-granular physics engine: capillary bridges between grains, a measured strength-versus-water curve, Culmann slope stability and Greenhill self-weight buckling. Answers whether wetter sand really is stronger sand. Independent implementation; physics credited in CREDITS.txt to Rumpf, Greenhill, Culmann, Richefeu et al. (2006), Scheel et al. (2008), Pakpour et al. (2012), Lu et al. (2009) and IAPWS R1-76(2014).

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.