Hi there, the brush I'm talking about is meant to be chewed on by the baby. As they chew, it brushes their teeth. I think I remember the pkg saying it cleans all sides at once. You don't actually move it back and forth. It was invented by a dentist, so hopefully he knew what he was making! I know when Keira grabs on to it, she happily bites away. Now, if she ever gets teeth (or hair for that matter), she can hopefully continue using the brush. She doesn't like my fingers in her mouth! Maybe once your lo got used to having something like that in her mouth, you could eventually move on to a real brush. Good luck!