Hi Deneen,
I believe your boy are very smart.Actually,I already show the flashcard to my boy from he's 3mths.I believe baby brain's like a sponge easy to absorbed data espcially image.I was showed to him an image such fruits, animal, colors and more with audio which my own voice.But I just showed to him 3 or four cards because I want him to absorbed it easier.They also like to listen a smooth music from their own mom.
Now he's 9mth so I'm a bit proud because he seem know the image I was showed to him before.He also knowing how to copy our facial expression like sign of kissing, showing he teeth, blinking the eyes.
But my boy will cry if 'm not holding him or I was far from him.He will be ok if he do not see me.I was think he very pamper