647 books • 111 series
Book #1: Giant Squid and Octopuses
Book #3: Box Jellyfish
Book #6: Real Life Sea Monsters
Book #1: Plants
Book #2: Animal Lives and Life Cycles
Book #3: The Human Body: Let's Investigate
Book #4: Rocks
Book #5: Earth and Space: Let's Investigate Facts, Activities, Experiments
Book #7: Sound: Let's Investigate, Facts, Activities, Experiments
Book #8: Electricity
Book #9: Forces and Magnets
Book #10: Solids, Liquids and Gases