How to lock/hide android status bar/navigation bar so swiping doesn't show it?

Hello everyone, I'm making a kids app that involves a lot of swiping and I noticed when playing you get the status bar to drop down or you get the back and home buttons to pop up on the navigation bar allowing unwanted and accidental exiting of the app. Is there a way to hide/lock these buttons so it is harder for children to accidentally exit the app? Its weird how this isn't a setting or a big issue because I can't find anything on this subject

 

Bump.