Defrost a pound cake.
Slice the pound cake long-ways (horizontally) into four sections.
Use one of your push-up pops to cut out circles of pound cake.
Put one piece of pound cake in the bottom of a push-up pop.
Blop in some pudding, then wipe down the edges of the push-up pop. (You could pipe in the pudding to make this neater.)
Repeat with another layer of cake and pudding.
Top with a third circle of cake and Cool Whip or frosting.