It is formed by the lower part of the femur, the tibial plateau and the knee cap. It enables hinge and rotating movements as the connection between the upper and lower leg. This means that we can not only bend the lower leg backward but also rotate the lower leg and foot towards the upper leg.
By the time they're 9 months old, most babies have developed the fine motor skills â the small, precise movements â needed to pick up small pieces of food and feed themselves. You may notice that yours can take hold of food (and other small objects) between forefinger and thumb in a pincer grasp.
In the UK, babies stop being called babies because six is the age when they could (or should) be able to eat meals with both knife and fork. Infant is a subset of baby and goes up to around 3. In the UK in my day, babies are also infants but they stop being infants when they can walk on their own.