This post (http://www.hotukdeals.com/item/576882/ooberman-the-magic-treehouse-cd-alb) led me to research the band Ooberman as I'd not come across them before. It turns out that they are making their entire back catalogue free to download in return for signing up for their newsletter. Once you sign up you get sent a link to the files and to some videos. The music files are in DRM free wma format. If you enjoy the music you can donate and/or buy the CDs.