Already open? Click your existing Gemini browser tab above. Use Open Gemini if you need to open it. To resume an earlier project, select its conversation from Gemini’s chat history.
1. Describe and check your idea
Describe the game or activity you want. Custom characters and mazes are supported. Describe every feature you want; the complete AI response is checked against your request.
Project steps
1. Check idea→2. Get code→3. Validate→4. Build
Project check
Buildable version
This is the version that will be sent to AI.
It has been adjusted to match what SchoolCoding Block Builder can build.
✓ The original teacher idea is kept above.
✓ AI receives this checked version.
✓ Unsupported advanced features are simplified before generation.
View the complete AI prompt2. Get your project code
Copy the prompt, then open Gemini in another browser tab. Use your own Gemini account. Keep both tabs open throughout this project.
In Gemini, paste the prompt and copy the complete response. Then click the Block Builder browser tab to return here.
Correct the AI response
Keep using the same Gemini chat for corrections. The copied correction includes your request, latest response, current code and the error.
Copy the correction below.
Click your Gemini browser tab and paste it in the same chat. Copy the complete corrected response.
Click the Block Builder browser tab and paste the corrected response here.
3. Paste and validate your AI response
Paste Gemini’s complete response below. Validate it, then build directly into Scratch.
Your project code is ready
Supported code checks passed. Build the project, then use Scratch’s green flag to test it.
Building replaces the project currently open in Scratch. Save it first if you want to keep it.
Ready for a project idea.
WELCOME TO BLOCK BUILDER
Start your Scratch project
Choose how you want to begin. You do not need to write code to get started.
AI
Have an idea?
Describe a game or activity in everyday words. The AI assistant helps you prepare its code.
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Already building in Scratch?
Read your blocks once, then enable Live text to follow later block edits automatically.
Need an idea? Try:
Get started with AI
1
Open workspace on right
Choose Create with AI, then open the dedicated Block Builder workspace.
2
Open Gemini on left
Keep Gemini and Block Builder visible in separate windows.
3
Check your idea
Describe your project, check it, then follow the numbered steps to prepare, validate and build.
For supported code instructions, rather than a game description.
Project code
Character: sprite "My name" using "Cat": — the first name is its label; using chooses the artwork. Scene: backdrop "Basketball 1". Type inside those quotes for library suggestions.
Start below a sprite heading with when green flag clicked, then type the next instruction on the line below. The button sets up the starting lines and places your cursor there.
Text uses Scratch block colours. Bold lines mark sprites, events and custom blocks; coloured guides show nesting. Tab indents code.
Project assets and settings
Preserved automatically when updating this project. Change artwork, costumes, sounds and starting positions in Scratch, then read the blocks again. Save the .sb3 to keep the complete project.
Text options
Variable layout
Positions use the stage’s 480 × 360 pixel layout. Counters are approximate previews; Scratch supplies their final appearance.
Scratch to Text shows readable code. Artwork, sounds and large map lists are reused from the open Scratch project when you rebuild. Save the .sb3 to keep everything.
