A complete set of brain development CDs beneficial for early childhood education. - Set Contents: CDs 1-12 - Title: Brain Development CDs Thank you for viewing. There are no pets or smokers. Playback has been confirmed at the time of listing, but as this is a used item, future listening is not guaranteed. There appear to be no noticeable scratches, but the condition is set to "slightly scratched" due to being a used item. Please understand that there may be oversights in the inspection, and only purchase if you are able to accept this.