Text and simple illustrations provide explanations of the principles of flight.

Explains in simple words various aspects of the moon, such as its rotation, orbit, composition, age, temperature, and location, as well as lunar eclipses, the moon's pull on the ocean, lunar landings, and surface features.

Simple Spanish text and activities explain the nature of time, its importance, and its measurement, exploring days of the week, seasons, months of the year, the concepts of past, present, and future, and more.

Uses simple experiments and activities to explore concepts such as density, upthrust, and water displacement and to explain why objects float or sink.

Presents simple experiments, with step-by-step, illustrated instructions, for studying the science of light, including how rainbows are made and how light can change directions.

Features different science projects, including turning a penny green, making salt disappear and reappear, and making butter.

Uses simple experiments and activities to explore concepts such as density, upthrust, and water displacement and to explain why objects float or sink.

Presents simple experiments, with step-by-step, illustrated instructions, for studying how things change shape and grow, including how seeds become plants, the effect of temperature on expansion and contraction, and growing crystals.