As you know the moment of a force = force x distance from
pivot and the centre of mass is the point about which the resultant moment of a body is
zero.
A body when tilted will return to a n upright position as long as the vertical from the centre of
mass goes not fall outside the base.
Using those three laws:
(a) you can build a mobile by hanging shapes from the ends of wire rods so that the system
balances. A series of rods one below the other can give a really complex but interesting
shape.
(b) toys that will "right themselves" (come back to a vertical position) can be made as long as
they have a curved base and a low centre of mass.
(c) tightrope walker models can be made showing the balancing effect of a person holding a
long rod.