Birds, mammals, reptiles, insects, the ecosystem and the nutrient cycle
Wildlife on the Earth, the animals of different continents and oceans
Dangerous natural phenomena: hurricanes, tornadoes, floods, tsunami, earthquakes etc.
The planet of Earth seen from space, the colours on the surface, conversations about rivers, the seas, deserts, mountains and volcanoes
Crafts that have disappeared, old tools and machines
Middle ages, knights, crusaders and their crusades, life and food of medieval aristocrats
The appearance of birds and their song, way of life, the importance of birds, their protection and interesting facts
Sun observation, sunspots, observation methods
Observing the Moon and other planets, multiple stars, star clusters, nebulae, galaxies and extraordinary astronomical phenomena
Basic movements of the Earth, alternation of day and night, motions in the sky, the seasons, equinox and solstice, calendar