Need a device for child demo at a expo. Needs to have 5 - 10 push buttons that will play a short wave file for each button. Can be a/c or d/c. Can have a built in speaker or a connector that I can hook up a external one. Should be someone local to my area. I can build a wood box or you can build a plastic or metal housing. Hope to be under a $100 It would be nice if the wav files could be changed but not required. York, Pa.