PB&J Smoothie

We have taken a break from out standard tropical fruit, spinach, kefir, and yogurt smoothie because I made this once and the kids love it!
Yes, they actually ASK for it!
I found the idea at 100 Days of Real Food. Great site!
I vary from the original a bit but the basics are the same and I want to give credit to the originator of the idea...

My Version:   1/3 c yogurt, 1/3 c kefir or milk, 1/3 c peanut butter, 1 banana, 1 c frozen blueberries

Blend together and serve.