Slice the bananas into 1/2" thick rounds and place them flat and untouching on a paper plate or a parchment lined baking tray. Set the bananas in the freezer and freeze for at least 2 hours.
Place the chocolate chips and the coconut oil in a small glass cup or bowl. Microwave at 50% power for 60 seconds, stir and microwave at 50% power for an additional 30-60 seconds just until the chocolate can be stirred. Stir for a minute or so, until the mixture is smooth. Line a small section of the counter or a baking tray with parchment paper or wax paper.
Remove the bananas from the freezer and gently pierce them one at a time with a toothpick and dip them into the melted chocolate. Turn slowly to allow the excess to drizzle off and then place on reserved parchment paper. The chocolate will already be almost set. You can skip the toothpicks and simply drop the banana pieces one at a time into the chocolate and use two forks to lift them out and allow the excess to drip off of the pieces. Set the coated pieces onto the parchment paper.
Eat immediately or place back into the freezer until ready to eat. I loved the bites straight from the freezer with the frozen banana inside. My kids loved them both straight from the freezer and after a few minutes on the counter when the banana had softened a bit. Enjoy!