One of the bigger electronics DIY sites on the net, Adafruit, put up a project that shows you how to use their parts to make a jacket with hidden buttons and speakers, so you can have your own sound effects whenever you want:

https://learn.adafruit.com/laugh-track-jacket

This is a project for someone with some electronics experience. The idea could be redone for different setups, not just in a jacket.

Oh man, how did I miss their holiday sound track sweater?!

https://learn.adafruit.com/sound-sample-sweater