What do we need the pocket watch for?
look what time it is
What do we need the submarine for?
to swim underwater
What do we need the telescope for?
to look at the sky
What do we need the eyeglasses for?
to see better
What do we need the helicopter for?
to fly in the sky
What do we need the printing press for?
to print books
What do we need the microscope for?
to look at tiny things
What do we need the thermometer for?
to measure temperature (hot or cold)
What do we need the parachute for?
to land safely from the sky
What do we need the tank for?
to fight