When we tried to list baby products that are completely and totally useless, we found it to be surprisingly difficult. Most baby products really do aim to make your life easier and your child safer. But then we found these.
Sure, there's a chance that once your kid starts crawling, he might run into a wall, but the odds that he'll need knee pads for all that rock climbing you have lined up for him, are not good odds at all. Also, I hate to tell you this, but your baby may not grow up to be a genius, and a CD isn't going to change that.