When I brought Joey to his first track day, he was right about a year old. I checked with my pediatrician about ear protection, and he felt it wasn't necessary. Their proximity to the noise and actual decibel level is not near enough to cause issues. Unless your kiddo is standing next to yout bike and your fire it up and rev the snot out of it, he shouldn't have an issue. But, if you still want to use protection, try the silicone plugs that you can squeeze and mold. You can even cut them to make them smaller. There are kid size ear plugs for swimming, and these would work also.