for Mokie & Bik Go to Sea by Wendy Orr and Jonathan Bean
Mokie and Bik live on a boat called Bullfrog. Now that their father has come home from the illy-ally-o, the twins are ready to take Bullfrog out to sea. First, though, they need to shipshape!
Soon Mokie and Bik are saving a runaway boat, making friends with a scaredy-seal, and keeping track of a Waggles with A Lot to Learn. Life with the twins is always a rollicky frolicking adventure!