How Would You Connect to Him if You Don't Have Three Other Kids?

Out of all four boys, I feel the least connected to him not granted he's a little guy. But I want so badly to connect with him and I just, I feel like I'm falling on my face a lot with him. And it's very hard. My tools that I have with the other three that's, that's, it's just not,. It's not that they're the wrong tools but they don't connect with him the same way.