Mackenzie likes to compare things to see how they are related. It's her way of understanding what something is. These are her recent comparisons.
Z like 2?
waffle like tortilla? (because it's round)
dragon like bat? (because of the wings)
whale like Jonah and fish?
S like 5?
shorts like pants?
bible like book?
She always asks them as questions and waits for you to answer yes or no or give some further information. I think it's really cute and I hope she continues to ask the questions and looks for ways to understand new things.