R.T.
Hey there,
I have 4 year old twins and had the same problem. We joined the YMCA and found many things for younger kids. Also I started them in gymnastics at Gymstrada and that's the best thing ever. You can even do Karate at 3 yrs old. My son wants to do Tball also but you have to be 5 by May to play this spring so we will have to wait for the fall. But there are so many things especially in the summer for them to do. Also check out your local rec center.