This setup wraps cloth around an object and let it keep its shape.

This setups cuts shapes out of a basemesh and converts them into inflated balloons.
This setup uses the smoke solver to dissolve an object filled with particles. In another step it creates a new object.
This sim increases the width of particles along a curve and keeps them seperated with the push apart node.
This sim locks particles in place with transform stick and releases them one after another to create a melting effect.