Now, experts (0) IN child development are finding similar evidence that babies (1) ............ need to be able to see how their body is positioned and how their limbs are moving (2) ............ order to reach their motor milestones. This means that the part (3) ............ the brain that coordinates muscle movements for activities such as walking and crawling will (4) ............ mature if it receives the necessary visual feedback. Knowing (5) ............, researchers have recently published a study that hypothesized that infant walkers, (6) ............ their inherent design, prevent a baby (7) ............ seeing its legs (8) ............ impeding motor skills development.