Introduction:

In this project, children will learn how to broadcast messages between sprites.

Resources

For this project, Scratch 2 should be used. Scratch 2 can either be used online at jumpto.cc/scratch-on or can be downloaded from jumpto.cc/scratch-off and used offline.

You can find a completed version of this project online, or it can be downloaded by clicking the ‘Download Project Materials’ link for this project, which contains:

• PaintBox.sb2

There is also a version of this project with the external resources pre-loaded. This is available online at jumpto.cc/paintbox-resources, or in the downloadable project materials, which contains:

• PaintBoxResources.sb2

This link also includes a ‘Project Resources’ folder, which contains images that children will need to complete this project. Make sure that each child has access to a copy of these resources.

Project resources:

• eraser.svg

Learning Objectives

• Importing images;
  
• Relational and boolean operators (> & and);
  
• Broadcasting between sprites.

Challenges

• “Shortcuts” - Using key press events to broadcast messages;
  
• “More pens” - Adding more pen colours, to consolidate the learning of broadcasting messages.

Frequently Asked Questions

• Changes in a sprite’s ‘costume center’ isn’t registered until another tab is clicked. Children should click on another costume, or on the ‘Scripts’ tab to finalise changes to the costume center.