iOS has extensive settings that allow you to control and restrict what content your kids are allowed to see, what they are allowed to purchase, what apps they can use and even how much screen time per app they are allowed. The Apple TV doesn't have quite the same amount of parental controls, but you can still certainly block in-app purchases, restrict viewing content and set some other boundaries.
Apple TV 4K
Taking a screenshot of the Apple TV 4K is different than taking one on the Apple TV 4G because it does not have a USB-C port to connect to your Mac with. Instead, you'll have to connect Xcode to your Apple TV 4K via Wi-Fi in order to take screenshots. Here's how to do it:
While you won't be able to record movies or other video protected by DRM (Digital Rights Management) on your Apple TV, you will be able to record other content including your video game play, which is pretty common thing to do if you are into gaming. The Apple TV 4K has no USB-C connector like its predecessor does, so you will have to pair your Mac with your Apple TV 4K in order to make screen recordings with QuickTime Player. Here's how to do it:
Rebooting the Apple TV normally takes a few clicks through the tvOS menu system under Settings. Flipping though on-screen menus takes time, and if an Apple TV is unresponsive it may not work. For a faster solution, there's a quick and easy way to restart the Apple TV without even looking at the screen.
No, Apple does not provide an HDMI cable with the Apple TV 4K. The box contains a power cable, Lightning to USB charging cable, Siri Remote and the main Apple TV unit.