1. Enable ID Attribute: First, ensure that the option to add ID attributes is enabled. To do this, go to the Settings tab, then navigate to General > Advanced Options, and check the box for Expose the option to add an ID attribute to HTML elements.

2. Add an ID Attribute to the parent group:
Next, add the ID attribute in the bottom section of the Appearance tab of the parent element. Remember, use lowercase and no spaces.

3. Call the Action:
Use the same ID name you specified earlier when calling the action. This will ensure that all direct children of the parent element are randomized.

Demo and instructions: https://randomize-containers.bubbleapps.io/version-test