Hi Betty Lou. I'd be happy to help you. To find MP3 files you can use a website like : http://beemp3.com/ (As a disclaimer, ensure you aren't violating anyone's copyrights on the music.)
2) If the sound file is less than 100 KB, then the music will be in the powerpoint, but if it is a bigger music file, you'll need to email the music file with the powerpoint. If they download it to the same location, the file will play as it is linked.
Thanks,
John
Informati&on Systems Architect
13+ Years of Cutting Edge Systems Engineering, Consulting (Fortune 100 and SMB), and Architecture