They are suppose to help. And my day care center uses baby signs. It helps get the brain functioning at a younger age.. I would recommend every one doing these with there children..

I strongly recommend using a sign program based on American (or British or wherever you are) Sign Language. Most baby signs are made up by the company which means your child will not be able to use them with anyone but you. If you use a program like Signing Time! then you'll get ASL and an entire culture and group of people opened to you.