Here is how we did it:
~ 3 bananas
~ 1 Hershey's chocolate bar
Line a cookie sheet with parchment paper. Cut bananas in half and stick a lollipop stick in center of one end. Put on parchment and put into freezer for an hour and a half to two hours.
Once frozen, melt chocolate bar in the microwave. I then put a generous dollop of chocolate on a plate for each of the girls to dip the bananas into. They then added some sprinkles as well.
Put bananas back onto parchment and back into freezer for another hour or so.