Harpo's World

comic book page about a contraption to make electricity with dog power.
Page 2

PERSIA: Harpo sees the pizza and starts running!

AKANE: This lowers the basket which pulls the rope and lifts the pizza out of the box.

PERSIA: The gears turn…

AKANE: …which generates electricity and turns on the light.

TEEGAN: I thought inventions were supposed to make things easier.

PERSIA: It's easy for us.

TEEGAN: How do you turn it off?

PERSIA AND AKANE: Hmmm—hadn't thought of that.

SQUIRREL (thinking): I don't think that will be a problem.


  • contraption: A mechanical device; a gadget.

Back to Top


  1. Which simple machine is used most often in this invention?
    [anno: A pulley is used most often in this invention]
  2. Describe how a lever is used in this invention.
    [anno: A lever is used to toss a baseball up against a board that moves a roller skate.]
  3. If the lever were removed from this machine, what other parts of the machine would need to change to make the invention work?
    [anno: Answers may vary but could include that the pulley attached to the nut could be attached to the nut on one end and the slice of pizza on the other end. This would mean removing the roller skate and the bowling ball that drops into the basket.]