The "Why?" Phase has begun

Last week (exactly) Iris started with the "Why?" "Why?" "Why?" response to everything we say.... I don't think she even understands what "why" means since when I ask her "Why," she gives me a blank I-don't-know-what-you-are-saying look.

Also - about two weeks ago Iris started playing pretend (at least that I could figure out). Now she jumps around saying "eee eee eee" and scratching her torso (she's a monkey), or raising her arms above her head and roaring (she's a dinosaur).... very cute.