You can configure K9 Web Protection to redirect all search performed from popular search engines (Google, Bing...) to its safe list:
- Open your web browser
- Enter "127.0.0.1:2372" or "http://127.0.0.1:2372/" in the address bar and press Enter.
- Click on Setup and enter your password.
- Go to the "Safe Search" section.
- In the right pane, check "Redirect to k9 Safe Search".
- Click on Save to validate.