When a 1L bottle is shaken, the blue and white beads mix within the liquid. When allowed to settle, the the beads separate, white at the top and blue at the bottom. However, shortly the two separated colored beads slowly come together until they meet in the center of the liquid, white on top of blue.

Balls with holes in them are arranged over a rod with alternating balls and springs. When held vertically the bottom spring is compressed more than the top one simulating the weight of air.

Evacuated hemispheres cannot be pulled apart.

A bocci (alt. spell :bocce, boccie, boccia (singular)) ball hanging from a scale that reads Newtons is lowered into water. Details are in the file cabinet where Demos are filed by DCS number.