summer coolers for family

We will have fruit smoothies or shakes for breakfast often in the summer, it is really healthy and cool, but nutritios, Most of the time it has yogurt, and bananas and then whatever else we have on hand. I am curious, what would be in an avocado shake. We do not eat avocados that way here in the United States. In fact, when I worked in a Mexican restaurant, they told me that if I drank milk with guacamole (avocado dip), I would throw up. I never did, however. I make guacamole, or just eat wedges of avocado. I cannot imagine them in a shake, although they are good with lime or lemon juice added.