Visual abilities are developed before learning to walk

Effective use of arms proceeds the ability to use hands

Grasping cannot be mastered before learning to integrate movement of individual fingers

Patterns of growth for body size, nervous system are different.

occur in an orderly and sequential manner.

occur at very fast pace in infancy and then there is no growth till adolescence.

always occur in a linear manner rather than a spiral manner.

occur in a forward manner till adolescence and then move backwards.