Here is a recipe I found at
http://cookie.allrecipes.com/az/HealthyBanana.aspIt looks perfect for the age of your child. You could probably leave out the dates if you are afraid they are a choking hazard. I might even try it myself today.
Healthy Banana Cookies * 3 ripe bananas
* 2 cups rolled oats
* 1 cup dates, pitted and chopped
* 1/3 cup vegetable oil
* 1 teaspoon vanilla extract
1. Preheat oven to 350 degrees F (175 degrees C).
2. In a large bowl, mash the bananas. Stir in oats, dates, oil, and vanilla. Mix well, and allow to sit for 15 minutes. Drop by teaspoonfuls onto an ungreased cookie sheet.
3. Bake for 20 minutes in the preheated oven, or until lightly brown.