Enjoying the silence

Right now, my bb and I have a silent home. We don’t have TV and we don’t have music. In order for him to become busy, I just put a crocheted thread on the bumper of his little toy truck. And he is so happy pulling it around the living room. But since he is a baby, he can’t live in an arrange area. He will be comfy and happy when he will see his toys messed and scattered around. As of the moment, he is sitting in the middle of his scattered toys but still holding the crocheted thread that I tied to his toy truck while trying to play with the other blocks. I just don’t know what’s in his mind for he is just mumbling words which I can’t recognize.