Although eh is the most overused baby word by Buchukoy, atatata... and adadada... are two of these additions to his vocabulary. Atatata... is not tita (or auntie). Adadada... doesn't mean daddy. He just speaks them to start a conversation or to reply. Sometimes, they can imply as he wants your attention. But oftentimes, he likes to use them to talk to himself.
Happy 1st birthday Buchukoy!