Jelly

A little soft-body physics toy. Each blob is a ring of point masses held together by springs, with an internal gas-pressure model that pushes the edges outward to keep its round shape — together they give that squishy, shape-restoring jiggle. Grab one and fling it; it'll wobble, squash against the walls, and bounce back.

Drag a blob to throw it around. Shake kicks them all, Add jelly drops another in, and Reset starts fresh.