Voting Machine





Name of Activity

Voting Machine


Daniel Meer (Elissa Milto)


gear ratios, gears, simple machines, voting machine, slowly oscillate, button, motor, arm, meshing


Simple Machines

Grade Level

K, 1, 2, 3, 4, 5, 6


1 Hour Total

Brief Description

Using what you know about gear ratios, take the motor from the simple machine kit and

build a voting machine using at least 2 gears. The arm should slowly oscillate to choose

between the two presidential candidates (or chicken and egg- what came first?) when you

press the button on the motor. The arm can be either vertical or horizontal as well as the icon

that it will point to.

Lesson Objectives:

– gears-controlled motor movement

-practical lego use

-critical thinking (building objectives)

Materials Needed:

– Simple Machine Kit- paper and pen

Preparation and Set Up:

Show that the arm should point to a logo or icon as in a gas gauge in your car points to empty or full. The arm should slowly oscillate between the two when the motor is activated in either direction.

Necessary Background


Gear Ratio



make students draw out plan for voting machine with which gears the arm and motor will attach to. let them build it. test it.

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