The fresh hit on the stores in the Kids Category Games these days are the Newborn Baby Games with massive amount of downloads. This mini kids game has a lot of potential, you would be able to see a lot of reskins of this game out there on the Google Play Store which proves that this project can be reskinned very easliy into any theme you want. You can think of having a mermaid with the baby or may be a Princess with her baby girl.

This Unity 2D project comes with full detailed documentation which includes the steps on how to change the graphics and UI.