Firefly & Fern

Stan Jones, Stanton L. Jones, Carolyn Nystrom

Ages 5–10human developmentlife cycle

Lark Carrier

Ages 4–8naturegrowth

Charles Ghigna

Ages 3–7naturegrowth

Erin M. Hovanec

Ages 4–8naturecuriosity

Doris Zagdanski

Ages 4–8deathgrief

Margriet Ruurs

Ages 3–7natureresponsibility

Emily J. Dolbear, E. Russell Primm

Ages 3–7animalslife cycle

Penguin Young Readers Licenses

Ages 2–6naturelife cycle

Susan Blackaby

Ages 4–8naturelife cycle

Karen Hartley, Chris MacRo, Philip Taylor

Ages 4–8natureinsects

Vivian French

Ages 4–8life cyclegrowth