CONTENTS 



CHAPTER 



Editor's preface 



Author's preface . 



I. — The surplus theory of play 

 II. — Play and instinct . 

 III.— The play of animals 

 Experimentation . 

 Movement plays . 

 Hunting plays 



a. With real living prey 



h. With living mock prey 



c. With lifeless mock prey 

 Fighting plays 



a. Teasing 



h. Tussling among young animals 



c. Playful fighting between adult animal: 

 Constructive arts . 

 Nursing plays 

 Imitative play 

 Curiosity 



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