One of a series of picture books in pocket-size editions. Trevor the terrapin is bored. When everyone else goes out for the day and he's left to tidy his room, he discovers that there's nothing quite so exciting as making a great big mess.
Trevor is asked to tidy up and ends up finding some interesting items along the way. I read these books as a child and loved the illustrations- a lighthearted read and especially good for those who lack the motivation to tidy up.