We have been on the Green Smoothie wagon for a couple years now. I seriously make these ever morning and feel good knowing my kids have had at least a little bit of nutrients to start the day off with. These are great for breakfast on the go!
Here is how I do it
I fill the blender up about 1/2 way with fresh spinach (Costco has big bags for a decent price)
Add in frozen / fresh fruit the rest of the way up (we get our frozen at Costco. Usually we have whatever is in season for fresh fruit)
I add a little vanilla, ground flax seed (so we can get those Omega 3 fatty acids), and vitamin C
Also if we have it I will throw in some soy milk or juice (apple, orange, pineapple)