| Dear Friend! | 3 |
| Building a Starship | 4 |
| | |
| The Center of Observations | 5 |
| The Room of All Knowledge | 10 |
| The World of Plants | 10 |
| The World of Mushrooms | 16 |
| The World of Animals | 18 |
| How the Living World was Growing | 31 |
| The World around us. What is Necessary for what | 33 |
| Food | 36 |
| Sense Organs | 40 |
| Climate, Weather and Seasons | 45 |
| Accuracy of Movements | 47 |
| The Storehouse of "Unnecessary Things" | 51 |
| The Booth of Similarities | 59 |
| The Unit of Generalizations and Classifications | 60 |
| The Department of Comparisons | 70 |
| The Combinatorics Workshop | 77 |
| The Logic Section | 78 |
| The Arithmetical Treasury | 83 |
| The Weighting Laboratory | 89 |
| A Picture according to the Rules | 92 |
| The Study of Analogies | 97 |
| The Society of Schematic Thinking | 99 |
| The Screen of Spatial Imagination | 104 |
| The Geometry Playground | 111 |
| Problems from a matchbox | 115 |
| The Language Salon | 117 |
| The Chest of Puzzles | 121 |
| The Room of Ideas | 126 |
| The Depository of Anagrams | 128 |
| Preparing for the Flight | 130 |
| The Questionnaire of Wiseboy the Coordinator | 130 |
| Training Attention | 134 |
