I'm a kindergarten paraprofessional and at our school, we teach the kinders P.E. I like to play warm up songs for the kids before we start instruction. Currently, we have a boombox in the gym but it does not project sound very well. I would like to have some sort of speaker/boombox/system that 1) is portable, 2) can connect to my phone, 3) is under $30. Any ideas? What kind of system do you have in your gyms? Ideally, our school would install a new stereo system!