How do you shut off iPod nano 4th or 5th generation?

Hello cdragz1,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with shutting down your son's iPod nano. If you're unable to shut it down, try force restarting it so that you can try to shut it down normally: Learn how to force restart your iPod - Apple Support

"iPod nano (5th generation) and earlier

Put the Hold switch firmly in the unlocked position. Then press and hold the Menu and Center (or Select) buttons for 8 seconds, or until you see the Apple logo.

Need more help?

• Not sure which model you have? 
• Learn how to charge your iPod nano or get help with other issues on your iPod nano.
• If you can't force restart your iPod (5th generation), set your device on a table and try again. This time, when you press the Center button, don't touch the Click Wheel. And when you press Menu, press near the outside of the Click Wheel instead of near the center."

We hope this helps.

Cheers!