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problem-solving

  1. Animal intelligence: Experimental studies
    Read For Free
    Edward L. Thorndike
    Animal intelligence: Experimental studies
  2. Nuts to crack: A galaxy of puzzles, riddles, conundrums, etc.
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    Anonymous
    Nuts to crack: A galaxy of puzzles, riddles, conundrums, etc.
  3. Harper's indoor book for boys
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    Joseph H. Adams
    Harper's indoor book for boys
  4. Pictured Puzzles and Word Play
A Companion to the Twentieth Century Standard Puzzle Book
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    A. Cyril Pearson
    Pictured Puzzles and Word Play
A Companion to the Twentieth Century Standard Puzzle Book

  5. A szellemi erők gyüjtése és pazarlása

    Elek Szitnyai

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    Elek Szitnyai
    A szellemi erők gyüjtése és pazarlása
  6. Meeting at the Summit
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    Ivar Jorgensen
    Meeting at the Summit
  7. Bring Back My Brain!
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    Dwight V. Swain
    Bring Back My Brain!
  8. The Safety First Club and the Flood
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    William Theophilus Nichols
    The Safety First Club and the Flood
  9. Twentieth Century Standard Puzzle Book
Three Parts in One Volume
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    Yazar Bilinmiyor
    Twentieth Century Standard Puzzle Book
Three Parts in One Volume

  10. The Essentials of Logic, Being Ten Lectures on Judgment and Inference

    Bernard Bosanquet

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    Bernard Bosanquet
    The Essentials of Logic, Being Ten Lectures on Judgment and Inference

  11. Child Whispers

    Enid Blyton

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    Enid Blyton
    Child Whispers
  12. De nuttige handwerken: handboekje ten dienste der lagere school
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    A. Teunisse
    De nuttige handwerken: handboekje ten dienste der lagere school
  13. Thinking and learning to think
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    Nathan Christ Schaeffer
    Thinking and learning to think
  14. The Play of Man
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    Karl Groos
    The Play of Man
  15. Doctor Rabbit and Ki-Yi Coyote
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    Thomas C. Hinkle
    Doctor Rabbit and Ki-Yi Coyote
  16. Thinking as a Science
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    Henry Hazlitt
    Thinking as a Science
  17. Handy Mandy in Oz
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    Ruth Plumly Thompson
    Handy Mandy in Oz
  18. Miller's Mind training for children Book 3 (of 3)
A practical training for successful living; Educational games that train the senses
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    William Emer Miller
    Miller's Mind training for children Book 3 (of 3)
A practical training for successful living; Educational games that train the senses
  19. Miller's Mind training for children Book 2 (of 3)
A practical training for successful living; Educational games that train the senses
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    William Emer Miller
    Miller's Mind training for children Book 2 (of 3)
A practical training for successful living; Educational games that train the senses
  20. Uncle Wiggily's Fortune
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    Howard Roger Garis
    Uncle Wiggily's Fortune
  21. Marks' first lessons in geometry
In two parts. Objectively presented, and designed for the use of primary classes in grammar schools, academies, etc.
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    Bernhard Marks
    Marks' first lessons in geometry
In two parts. Objectively presented, and designed for the use of primary classes in grammar schools, academies, etc.
  22. Merry's Book of Puzzles
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    J. N. Stearns
    Merry's Book of Puzzles
  23. Conundrums, Riddles and Puzzles
Containing one thousand of the latest and best conundrums, gathered from every conceivable source, and comprising many that are entirely new and original
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    Dean Rivers
    Conundrums, Riddles and Puzzles
Containing one thousand of the latest and best conundrums, gathered from every conceivable source, and comprising many that are entirely new and original
  24. Ants and Some Other Insects: An Inquiry Into the Psychic Powers of These Animals
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    Auguste Forel
    Ants and Some Other Insects: An Inquiry Into the Psychic Powers of These Animals

  25. How to Amuse Yourself and Others: The American Girl's Handy Book

    Adelia B. Beard

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    Adelia B. Beard
    How to Amuse Yourself and Others: The American Girl's Handy Book
  26. The Brownie Scouts at Silver Beach
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    Mildred A. Wirt
    The Brownie Scouts at Silver Beach

  27. Inventing for Boys

    A. Frederick Collins

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    A. Frederick Collins
    Inventing for Boys

  28. The Art of Inventing

    Edwin J. Prindle

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    Edwin J. Prindle
    The Art of Inventing
  29. The Boy Mechanic, Book 2: 1000 Things for Boys to Do
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    Yazar Bilinmiyor
    The Boy Mechanic, Book 2: 1000 Things for Boys to Do
  30. A Ticket to Adventure
A Mystery Story for Girls
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    Roy J. Snell
    A Ticket to Adventure
A Mystery Story for Girls
  31. Gorillas & Chimpanzees
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    R. L. Garner
    Gorillas & Chimpanzees
  32. Invention: The Master-key to Progress
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    Bradley A. Fiske
    Invention: The Master-key to Progress
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