A mono stereo made out of an old mini radio, a tennis ball and some 99 cent headphones , bye the way this is my first instructable so sorry if it sucks. Sorry for the fuzzy pics.
Step 1: Materials
A tennis ball
a speaker about the size of a tennisball
Hot glue gun
a very sharp knife
Step 2: 1. cut the tennisball in half
this is pretty obvious, just take the knife and cut the ball in half
Step 3: Stereo part
take the 99 cent head phones and cut off the speaker part. then strip the two ends about a centimeter from the top. Solder one end to the plus side an one to the negative side.
Step 4: Glue the speaker into case.
simple as that, now you have a mono stereo out of a tennis ball good job!