How would you ever know? Isn't it worth it to do whatever you can to help your child be the strongest mentally they can be? I read a lot when I was pregnant and learned that infants only see contrasts so I made my son's room (I didn't know he was a he - they didn't do ultrasound without good cause 26 years ago) very stimulating so he would be visually engaged when he was lying in his crib. I also sewed the crib bumper and appliqued different 'scenes' to each panel using a variety of fabrics from slippery to rough like courdory, soft and stiffer (although not plastic or anything that would be uncomfortable). Later I read that you should talk to your child so while shopping I am sure people thought I was nuts since I told him outloud each and every item I put into the cart. He is a very bright and engaged adult and in grade school he excelled tremendously. Maybe he would have been the same if I had put him in an oatmeal room and ignored him but I wasn't taking any chances. I also used to sing him to sleep at night and I still remember the words I made up and the melody I would use since he had 'monkey mind' a lot as a young child (maybe too much stimulation ??). I bet your child will be very bright from reading your writing. Relax and enjoy the ride it is a short one.