It's an "X".

Driving down the road, this was the conversation (?) between Elayna and me.

Mom! Mommy!
What?
Mama! Look!
What?
MaMA!
What?
Mommy!
Elayna, what?
Look! Mom! Look!
What do you see?
Mom!
Tell me.
It's an "X".

Yes, that's right. My kid had a crazy excited freakout over an "x".