Intelligent parents, however, realize that the particular setting of each family is unique,and there can be no rigid reneral rules.
All parents have to solve the problems of freedom and disciplines.The younger the child,the more readily the mother gives in to his demands to avoid disappointing him.She knows that if his energies are not given an outlets,her child's continuing development may be warped(扭曲）
A child must be allowed to enjoy this “messy”but tactile（触觉的）stage of discovery before he is ready to go on to the less physical pleasures of toys and books.Similaryly,throughout life,each stage depends on the satisfactory completion of the one before.
这段A child must be allowed to enjoy this “messy”but tactile（触觉的）stage of discovery before he is ready to go on to the less physical pleasures of toys and books。这句怎么理解？

每个孩子最初必须让他们有一个触觉上的玩乐阶段，这会把家里弄得乱糟糟的。过了这一个阶段，他们才会慢慢脱离对玩具或是书本肉体上的快感。

意思就是说，小孩子最初玩玩具，只是手感上的快乐，因此，他们就会把东西乱丢，这时是没有理性的。但慢慢的，他们手感的快乐会逐渐减少，呈现出理性来。

个人理解，仅供参考。