The X

Today I was in the car with Dash on the way to pick up Ella from swim lessons, and as we drove, Dash kept asking "Is that the X?  Where is the X?"  I was so confused, looking wildly around for giant Xs because I have learned (the hard way) that when I have no idea what the kids are talking about, they are very clear and I better figure it out.   Finally, I realized that I had told him we were going to the Y to pick up Ella.  X, Y, sure, those letters are pretty close in the alphabet.  I get it.  And I like it.  Going to the X sounds a lot more exciting.

Sweet (with parentheses)

Ella left me this note and these treasures she found outside today.  When did she learn how to use parantheses?