They've been working on The Dictionary Story pretty much ever since. "But not working on it full time, seven years total" clarifies Oliver Jeffers. "Maybe if you were to add it all up, I don't know.

Eric Ruhalter is the author of a funny gift book for parents: “The Kid Dictionary: Hilarious Words to Describe the Indescribable Things Kids Do.” Watch the brand new holiday book trailer here.

Google is simultaneously encouraging kids to ask more questions. It's adding a "Kids Dictionary" to Assistant that provides age-suitable answers on speakers, displays and mobile devices.

The end result is a combination of photography, painting, ink handwriting, and typography, for the dictionary definitions. "It looks like a real dictionary," says Jeffers.