Cook cake mix according to instructions.
Once the cake is cooled, crumble it up. Then slowly add frosting until you can roll them into balls (without being too doughy). Make sure they are a tad crumbly.
Melt white chocolate and dip the cake pop stick into the chocolate.
Put the chocolate end of the stick into the cake pops. This will create a "glue" to make it easier to dip the cake pops into the white chocolate.
Once the "glue" hardens, dip the whole cake pop into the white chocolate and decorate with rainbow sprinkles.
Let the cake pops sit in the refrigerator until the chocolate hardens.