Hi -
http://www.wikihow.com/Freeze-Bananas
Banana Ice Cream
http://www.thekitchn.com/how-to-make-creamy-ice-cream-with-just-one-ingredient-cooking-lessons-from-the-kitchn-93414
Freezing Smoothies
http://www.lynnskitchenadventures.com/2011/03/freezing-smoothies.html