Scratch4KIDS: October 2026

Tuesday, October 20, 2026

#4 Convert sb3 files to exe files

You can convert a Scratch file (.sb3) into a standalone Windows executable (.exe) using a free web tool called TurboWarp Packager. This tool bundles your Scratch project into a standalone app that anyone can run without needing Scratch installed.

Here are the step-by-step instructions to convert your file:

Step 1: Pack the Project Using TurboWarp

Open your web browser and go to the TurboWarp Packager.
Click Choose File and select your .sb3 file from your computer. (Alternatively, if your project is uploaded online, you can paste the Scratch Project ID).
Wait for the project to load completely into the packager.

Step 2: Configure Your Settings

Scroll down the page to customize how your application behaves:

App Title: Enter the name you want for your game or project.
Icons: Upload a custom .png or .ico image to replace the default Scratch icon.
Controls: Choose whether to show or hide the green flag, stop sign, or pause buttons.
Performance: You can enable options like 60 FPS or Interpolation for smoother gameplay.

Step 3: Package into an EXE File

Scroll down to the Environment section.
Under the Target platform dropdown menu, select Windows (x64).
In the Output type dropdown, select Plain application (.exe).
Click the large Package button at the bottom of the page.
The site will compile your code and download the .exe file directly to your computer.

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To package your Scratch project (.sb3) for macOS or Android, you will use the same TurboWarp Packager tool, but with different environment settings.

🍏 How to Package for macOS

Apple has strict security rules for running applications that do not come from the App Store. The packager gives you a few options depending on how you plan to share it:

Go to the TurboWarp Packager and upload your .sb3 file.
Scroll down to the Environment section.
Set the Target platform to macOS (x64 or ARM64).
Set the Output type based on your needs:
- Application (.app): Creates a standard Mac app. You will need to right-click it and choose Open the first time to bypass Apple's security warnings.
- DMG Installer (.dmg): Packages the app into a clean installer disk image (best for sharing with others).
Click Package to download the file.

🤖 How to Package for Android

Android requires apps to be bundled into an APK file. Because mobile devices rely on touch instead of a keyboard, you may need to add mobile controls first.

Step 1: Prep Your Project for Mobile (Optional but Recommended)

If your game uses keyboard arrows or spacebar controls, mobile users won't be able to play it easily.

Scroll to the Extensions section in TurboWarp.
Enable D-Pad / Virtual Joystick or Custom Key Overlays so on-screen touch controls pop up automatically on the phone.

Step 2: Package the APK

In the Environment section, change the Target platform to Android.
Select APK as the output type.
Fill out the App ID (this looks like com.yourname.gamename and must be unique).
Click Package.

Step 3: Install it on Your Phone

Transfer the downloaded .apk file to your Android device.
Open the file on your phone.
Your phone will say "Installation blocked from unknown sources." Go to your phone settings when prompted and toggle on Allow from this source to install it.

#3 Animating Characters .sb3 file from python

To animate the letters of "MANIKUMARI" in Scratch dynamically via Python, the script below creates an independent sprite for each letter, assigns it a vector graphic text costume, spreads them horizontally across the stage (x = -200 to x = 205), and embeds an automated animation loop into each sprite (when green flag clicked → forever → change y by 15 → wait → change y by -15 → wait).

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Python :

import json

import zipfile

import hashlib

import os

def create_animated_text_project(text="MANIKUMARI", output_filename="generated/animate_manikumari.sb3"):

targets = []

# 1. Base Setup for the Stage

stage = {

"isStage": True,

"name": "Stage",

"variables": {}, "lists": {}, "broadcasts": {}, "blocks": {}, "comments": {},

"currentCostume": 0,

"costumes": [{

"name": "backdrop1",

"dataFormat": "svg",

"assetId": "cd2151ac61ecaa654d0aa79046a8041c",

"md5ext": "cd2151ac61ecaa654d0aa79046a8041c.svg",

"rotationCenterX": 240, "rotationCenterY": 180

}],

"sounds": [], "volume": 100, "layerOrder": 0, "tempo": 60, "videoState": "on", "videoTransparency": 50

}

targets.append(stage)

costumes_data = {}

# 2. Generate a separate Sprite and Code Stack for each letter

for i, char in enumerate(text):

# Generate custom SVG asset for the letter block

svg_content = f'<svg version="1.1" xmlns="http://w3.org" width="60" height="60"><text x="10" y="45" font-family="sans-serif" font-size="50" fill="#8A2BE2" font-weight="bold">{char}</text></svg>'

md5_hash = hashlib.md5(svg_content.encode('utf-8')).hexdigest()

costumes_data[md5_hash] = svg_content

# Calculate individual X positions so the letters don't stack on top of each other

x_pos = -200 + (i * 45)

# Generate JSON representation of Scratch block stacks

sprite_blocks = {

"when_clicked": {

"opcode": "event_whenflagclicked",

"next": "forever_loop",

"parent": None, "inputs": {}, "fields": {}, "shadow": False, "topLevel": True, "x": 100, "y": 100

"forever_loop": {

"opcode": "control_forever",

"next": None,

"parent": "when_clicked",

"inputs": {"SUBSTACK": [2, "change_y_up"]},