ipod shuffle podcast

Hello I'm new to the communities can someone please explain to how to get podcast on my iPod shuffle 4th gen? I download them and it shows they are in the podcast folder but it doesn't play but it'll play music I have on it. So I have to manually download them>add them into the library>right and sent to device? Over on the left hand side where it says

__On my device__

music

podcast

audiobooks

it shows I have it in the folder as well as audio files in the music folder but i can't get it to switch over??

Would be much appreciated if someone could help me this is frustrating thanks