In a medium saucepan, combine butter and marshmallows and heat over medium heat. Stir until there are only a few lumps of marshmallows left and butter is completely melted.

Add the rice krispies and stir until the krispies are completely coated.

Roll rice krispies into 1 inch balls and place on wax paper.

When all the krispies are rolled, melt chocolate according to package directions.

Dip the krispy treats in the chocolate and place back on the wax paper.

Before the chocolate hardens all the way, shake some sprinkles on top and then let sit until chocolate is hard.