How do you load files recursively from the command-line in linux?

There are two console programs I use - fbi for viewing images and mpg123 for mp3s. Loading all files from a folder is as simple: mpg123 /foo *.mp3 or fbi /foo *.jpg However, I would like to be able to load not just the content in a particular folder, but also all the files recursively in all the other folders nested within.