The material in the Montessori environment provides the opportunity for a variety of experiences.  The exercises of Practical Life such as pouring, polishing, sweeping and so on are very important for the physical and mental development of the child.  These exercises are real and not make-believe.  They help the child to do in a more perfect and orderly manner what he/she strives to do in any case by his/her natural impulse.  They are tasks which the child enjoys doing which, by repetition and practice, increases his/her muscular co-ordination and concentration and helps his/her movements to become precise instead of random.  Physical exercises and balance activities are also incorporated within the curriculum.  Unlike the adult whose interest is to complete the activity, the child achieves self-development through the effort of the activity.  The child first does the practical life exercises for his/her development, then for the community.  The older child is delighted to do chores for his/her social need.  He/she loves to help the younger ones to undo a difficult zipper, tie a shoelace, or help with aprons.  The child is shown, in groups, examples of good behaviour and manners such as shaking hands and saying “excuse me”.