This book discusses different aspects of time and how we measure it, including clocks, calendars, time zones, day and night, the seasons, and more.

Explores the four seasons, discussing such topics as the difference in shadows, temperatures, and the length of days, and what happens to plants and animals at different times of the year.

An introduction to electricity, discussing static electricity, turbines, batteries, magnetism, and the uses and safety aspects of this power source.

An introduction to astronomy, with information about such topics as how stars are born and how they die, why stars twinkle, and how to identify constellations.