Take any left over cake mixture you have and buttercream.
For melting chocolate keep a vessel with water and a fitting bowl over it.
When water starts to boil put chopped white/dark chocolate separately mix thoroughly till it forms shiny mixture without lumps and keep ready.
In-between add butter cream to the cake crumble and make tight balls out of this and keep.
Dip each ball in dark or white chocolate and keep it in a butter paper lined pan to set in fridge.
All the decorations can be done as per your ideas.
After the chocolate sets serve.
Notes
I have not used pop sticks as I have served in small paper cups.
You can use different type of sprinkles to decorate the cake pops.
Any type of left over cake can be used to make this cake pops.