My daughter has hit that phase where her first question is "what's that?" and her next question is "why?" It took about 5 rounds of this before I determined that she wasn't interested in "why" she was making conversation. As such, I respond with "why not?" Satisfied, she has now omitted the "why." This has led to some delightfully Taoist proclamations. "Whatsat?" "That's a garbage truck!" "Why not!" ... "Whatsat?" "That's called a 'floor clean-out.'" "Fwokeenout WHY NOT?" ... "Look! The moon!" "Why not!"
This is a fun age, I loved when my daughter's language was first emerging. I have audio of her spending five minutes having a conversation with the moon. Saying things like, "hello moon, how are you. I love you moon. Tiger is mine. No moon you no take tiger.." All while looking up at the moon from the back seat of our car. She has a stuffed tiger she loves. Anyways, it's all amazing!!!! Have fun. My father in law tells a story about my wife as a small girl. She would always ask "why." She asked this so much that he eventually said to her in frustration, "Honey, if you ask me why one more time you have to go to your room." She paused for a moment, looked up at him and asked, "how come daddy?" Smart kid.