A kindergarten-level introduction to battleships, covering their captains, weapons, role in battle, and such defining features as their decks.
A kindergarten-level introduction to fighter jets, covering their pilots, weapons, role in battle, and such defining features as their wings.
A kindergarten-level introduction to armored vehicles, covering their crew, weapons, role in battle, and such defining features as their wheels.
A kindergarten-level introduction to tanks, covering their drivers, weapons, role in battle, and such defining features as their turrets.