Peel bananas, cut each crosswise in half. Inset a wooden stick into the cut end of each banana piece. Wrap tightly in plastic wrap or in a plastic freezer bag and freeze till firm, 2 hours or overnight. In small microwavable bowl, combine chocolate chips and peanut butter. Heat in microwave oven, on high 1 1/2 minutes or till chocolate is melted when mixture is stirred. Using a knife, spread, mixture evenly over bananas, mixture will freeze immediately. Wrap in wax paper or plastic wrap and freeze till mixture is set, 15 to 20 minutes. Wrap well and store in freezer.