Tubi Kids Mode on your iOS device allows you to limit viewing to kid-appropriate (PG rated and lower) content.
To enter Kids Mode, just tap the "Kids" icon in the upper right corner of your Tubi app. You will now only see kid-appropriate content in your Tubi app!
To return to the full Tubi app, tap the "Kids" icon again - now it's located in the top left corner of the app.