Insert toothpicks into the botttom of each heart for dipping, if desired.
Heat chocolate chips and vegetable shortening in the mircowave for 45 seconds, Stir and continue heating and stirring at 15 second intervals, until smooth.
Allow the chocolate to cool for about 5 minutes, stirring occasionally.
Dip the hearts in the chocolate and allow the excess chocolate to drip off while gently tapping and shaking the toothpick.
Place the chocolate covered hearts on waxed paper and top with sprinkles.
Allow the chocolate coating to cool and harden before storing in an air tight container.