Hello World by Paul Beavis.
Mrs Mo’s monster has been tamed but his spirit is still lively. He now resides in a tidy attic with a semblance of order while Mr and Mrs Mo are painting the house red.
Monster is still blue with three broken teeth in his mouth and his thin hairy arms still direct play. But he is bored and wants to go on an adventure. Mrs Mo suggests tomorrow so monster loads up his bag and off he goes dropping stuff all along the way like Hansel and Gretel.
Soon he is lost as he tries to find a big hill to climb. Mrs Mo has adopted a motherly concern for monster and in her modest school marmish skirt, blouse and sensible shoes she follows monster picking up his belongings as she goes.
Together they climb the hill, look out on their world and say hello.
Simple yet detailed illustrations and the right amount of written text. My granddaughters loved it and so will you.