---
title: "Mechanisms That Make Things Move"
description: "A mechanism turns one movement into another: a push into a lift, a turn into a wobble, a small force into a big one. Levers, linkages, cams and cranks are the pieces a maker reaches for."
canonical: https://lightmysky.com/learn/design-and-technology/mechanisms-that-make-things-move-mt_i6Je5hnxJz
source: https://lightmysky.com/learn/design-and-technology/mechanisms-that-make-things-move-mt_i6Je5hnxJz.md
retrieved: 2026-11-12
---

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# Mechanisms That Make Things Move

A mechanism turns one movement into another: a push into a lift, a turn into a wobble, a small force into a big one. Levers, linkages, cams and cranks are the pieces a maker reaches for.

Subject: Design & Technology · Area: Designing & Making · Ages 9 to 11
Page: https://lightmysky.com/learn/design-and-technology/mechanisms-that-make-things-move-mt_i6Je5hnxJz

## Ready when they can

- Say which mechanism is inside a moving toy or a pop-up card and say what it converts
- Explain what a cam does to a follower and why the cam's shape decides the movement
- Pick a mechanism for a stated job, such as making a puppet's arm wave
- Say why a linkage can reverse a direction of movement

## Lesson: Turn one movement into another

Turn a key on a wind-up toy and its legs wobble. That's a mechanism: it turns one movement into another, a push into a lift. Levers, linkages, cams and cranks are the parts a maker reaches for.

**Example.** A cam is a turning part that pushes a follower rod. As the cam turns about its turning point, the distance from that point to the edge touching the rod changes, so the rod rises and falls. A round cam can do this too when its turning point sits off to one side of the round shape. A raised part of the cam edge is called a lobe. A taller lobe reaches farther from the turning point, so it pushes its follower higher.

A linkage joins bars that push and pull each other, and it can even flip a direction. To wave a puppet arm you would pick a crank or a linkage, since a turning input suits a waving output. Say the full chain and what goes in and out.

**Tip.** Open a moving toy or a pop-up card and say which part is inside. Then say what goes in and what comes out, like turn in, lift out.

Push one end of a bar down and the bar turns about a fixed pivot between its two ends, so the other end goes up. That turn reverses the movement. A linkage joins bars at pivots like this. A forward push can turn a bar about its pivot, and the far end can then move down. The joined bars pass the movement on, but the pivot changes its direction.

*(drawing: A bar with a pivot between its ends turns a down push into an up movement.)*

**Recap.** Say which mechanism it is, then state which movement goes in and which comes out.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Levers, Pulleys & Gears](https://lightmysky.com/learn/science/levers-pulleys-and-gears-mt_Q2k3fSwyzQ)

## Optional connections

- [Strengthening Structures](https://lightmysky.com/learn/design-and-technology/strengthening-structures-mt_QnYDI3itJY)

## Opens up

- [Electronics in a Product: Switch, Sensor, Output](https://lightmysky.com/learn/design-and-technology/electronics-in-a-product-switch-sensor-output-mt_KNLW4qke5J)