You can display categories and posts randomly with this widget.
“WP Randomize” adds a powerful widget to your wordpress which you can fully customize it.
This widget displays selected categories randomly with their posts. You can choose to display posts inside each category randomly as well.
You can contribute to this plugin from Github:
* WP Randomize Github Repository
You can always contact us at this email:
Please ask your support related questions in plugin’s support forum.
Go to your dashboard and select “add new” from plugins setting page. Search “Advance Random Categories & Posts”, Install and activate it.
You can install this plugin by downloading zip file and uploading it to “plugins” directory as well.
From “Dashboard -> Appearance -> widgets” you can add and configure this widget.