You're in the middle of explaining why the sky is blue to a curious 4-year-old boy when suddenly they hit you with an unexpected "but why...?"

You're caught in a whirlwind of "whys" that never seems to end, each "why" more persistent and hilarious than the last. It's a never-ending quest for answers to life's most fascinating mysteries!

This behavior demonstrates their burgeoning intellectual curiosity and desire to understand cause-and-effect relationships. It's a critical stage where they are expanding their knowledge, seeking explanations, and developing their critical thinking skills.