Module 3: Cats

Official Raspberry Pi Project

This lesson is based on the official Raspberry Pi Foundation project. Open it alongside this guide to access the starter project, step-by-step instructions and community remixes.

How to use it: Click the link above, then click See Inside on the Scratch project to explore the finished version. Use Remix to get your own copy to edit.

What You Will Build

Create an interactive cat animation with movement and backdrop changes.

What You Will Learn

By the end of this project you will be able to:

• Use Events blocks to start scripts and respond to clicks
• Combine Motion, Looks and Sound blocks to create behaviours
• Use variables to track game state and scores
• Apply the specific Scratch concepts introduced in Module 3

You Will Need

Step-by-Step Guide

1. Add an outdoor and an indoor backdrop.
2. Add a cat sprite with walking, sitting and sleeping costumes.
3. When the flag is clicked: animate the cat walking across the stage.
4. When the cat reaches the right edge: switch to indoor backdrop.
5. Add a food bowl sprite. When the cat touches it: play a eating sound, change to happy costume.
6. Add a yarn ball that the cat chases (it rolls and the cat follows).
7. Add an interactive pet the cat button — when clicked: cat purrs and grows slightly.
8. Add a hunger meter that decreases over time. When empty: cat meows for food.
9. Add a sleep mechanic — after 30 seconds of inactivity, cat switches to sleeping costume.
10. Add day/night: backdrops change based on a timer variable.

Extension Challenges

Try these after completing the main project:

• Add multiple cats with different personalities.
• Add a vet mini-game when the cat gets sick.
• Add a kitten that grows into an adult cat over time.

Reflection Questions

1. Which Scratch blocks did you use most in this project?
2. What would you add or change if you had more time?
3. How could you reuse the ideas from this project in a different context?

Share Your Work

When your project is complete, click Share in Scratch and post the link to your class or the Techbase community.