your sister, probably made that document in Word format, and you are trying to open it with WordPad or Notepad.
you can either email her back and have her copy and paste what she has on that doument into a regular email, or have her save it as Rich Text Format, and send it to you again.
second, email those attachments to someone with Word, so they can convert it back to something you can see.
get it? got it? good..