9781554530274 | Board book edition (Kids Can Pr, April 1, 2006), cover price $7.95 | About this edition: As Busy Little Mouse hurries outside to play, children are introduced to his many farmyard playmates, and their unique way of communicating with Busy Little Mouse.

9781550747768 | Kids Can Pr, March 1, 2002, cover price $12.95 | About this edition: After hurrying outside to play, Little Mouse meets various farm animals and each has something to say, including woof, oink, baa, moo, meow, quack, and neigh.

9781550747782 | Kids Can Pr, March 1, 2004, cover price $5.95 | About this edition: As Busy Little Mouse hurries outside to play, children are introduced to his many farmyard playmates and the sounds they make.

9780606313834 | Demco Media, September 29, 2004, cover price $14.66 | About this edition: As Busy Little Mouse hurries outside to play, children are introduced to his many farmyard playmates and the sounds they make.

9780375827372, titled "A Busy Year" | Board book edition (Alfred a Knopf Inc, January 1, 2004), cover price $6.99 | About this edition: Mouse twins befriend a tree and watch it grow and change throughout each month of the year.

9780679824640, titled "A Busy Year" | Alfred a Knopf Inc, March 1, 1992, cover price $7.99 | About this edition: Mouse twins befriend a tree and watch it grow and change throughout each month of the year.

9780785741404 | Turtleback Books, November 1, 2001, cover price $19.95