When Rosie is unable to invent a contraption to help one of Aunt Rose's Raucous Riveters friends, she calls on classmates Iggy Peck and Ada Twist to help.

When her abuelo is injured at the local landfill, second-grader Sofia is determined to transform the dangerous Mount Trashmore into a park, taking on City Hall in the process.

Sofia is put in charge of overseeing a fair election for a class pet, but first the Questioneers must learn about elections and good journalism--and remember that being a community matters most. Includes facts about the Delano Grape Strike, presidential elections, journalism, and the importance of voting.

"Why do airplanes look the way they do? Why can't birds fly when they're first born? And why do some paper planes fly farther than others? Discover everything there is to know about flight from Ada Twist, Scientist--from information about creatures that fly, to the history of aircrafts, to modern technology that allows us to soar through the air faster than ever!"--Amazon.

When pets go missing in Blue River Creek it is up to Ada to follow the scientific method by making a hypothesis, collecting data, and experimenting to find the missing animals.

When Zookeeper Fred's green snake Vern gets loose in the zoo, the Questioneers need all their talents to help find him, but in the end, it is Aaron's art that leads the way. Includes facts about snakes.