Mix Base: Combine Rice Krispies, peanut butter, sugar, butter, and vanilla.
Shape Balls: Roll 1-inch balls; place on parchment paper.
Melt Chocolate: Microwave chips with coconut oil, stirring smooth.
Coat: Dip balls in chocolate, removing excess.
Decorate: Add sprinkles before chocolate sets.
Chill: Refrigerate 30 minutes, then serve or store.
