CLICK, CLACK, MOO Cows That Type; Dooby Dooby MOO; Thump, Quack, MOO: A Whacky Adventure; Giggle, Giggle, Quack; CLICK, CLACK, Quackity-Quack: An Alphabetical Adventure; CLICK, CLACK, Splish, Splash: A Counting Adventure (CLICK, CLACK FUN!, 6 Book Set)