Instructions 

Do some gentle stretches with your baby as part of the morning or afternoon routine. With your baby in your lap, slowly stretch out their arms, up, then down, then in and out. Next, cross your baby's arms around the body (like a self hug). Do this first with the left arm over the right arm, and then switch, bringing the right arm over left. Try switching this up by doing stretches to the beat of music.

The Science 

The stretching motions in this activity allow your baby to cross the midline of the body. Crossing the midline helps to organize a baby's brain; over time, a more organized brain is better able to process information in the everyday environment.