Insert the stick in the cut side of the banana. Place on baking paper then place in the freezer until frozen, about an hour.
Over a saucepan of lighlty simmering water, place a heat proof bowl. Stir together the chocolate bits, butter and cream until smooth. Dip each banana in the chocolate mixture then place back on the baking paper. Sprinkle with hundreds and thousands.
Place back in the freezer and freeze until chocolate is set. Store in the freezer until ready to eat.