Kid's MP3 Player

[karsen]

My daughter is really in to music and loves dancing to the radio in her room. The problem is there are basically no stations that play age appropriate music. I decided to move her iMac from the Living Room to her Bedroom so I can load it with kid-safe tunes.

I need a suggestion on a free, easy to use MP3 player for my 4 year old daughter. Preferably something lightweight that won't kill her little Graphite iMac G3.

Thanks!