Ono created the concept for the book in 1996, when she was experimenting with digital art. It was inspired by a 1969 Fluxus by Plastic Ono Band, a group Ono and John Lennon were members of, in which they had planted acorns at Coventry Cathedral for peace. Subsequently, they mailed other acorns to world leaders with a note: "Enclosed in this package we are sending you two living sculptures — which are acorns — in the hope that you will plant them in your garden and grow two oak-trees for world peace."[3]