When my wife and I were expecting our second child, we attempted to acclimate our daughter to the idea she wasn’t going to be an only child anymore.
We began by pointing to mommy’s growing belly and saying, “baby”. Eventually she would giggle and point, saying, “baby”. Whether or not she understood, this became her favorite game.
One day, we were standing in a line at the DMV. She looked up at me, pointed at my belly, and loudly exclaimed, “BABY!”.