With her 2004 picture book Sharing a Shell British children's author Julia Donaldson has a hermit crab busily searching on the beach and in tidal pools for a new home as his/her older abode is no longer big enough. And upon finding a new and suitably spacious shell in which to live, a sea anemone comes along and asks to share the hermit crab's new place of residence with the promise to protect the crab (and of course also the shell) from predators, and then a passing bristleworm also asks, offering to keep the shell clean ad tidy in return (and with the crab quite readily agreeing to basically having two permanent roommates). But after a period of time a bigger shell is once again needed, and while at first the hermit carb, sea anemone and bristleworm squabble amongst themselves and end up going their separate ways, at the end of Sharing a Shell, the bristleworm finds a new and larger shell, and crab, sea anemone and bristleworm once again move in together.
Now of course, Julia Donaldson's text for Sharing a Shell is not really scientifically realistic with regard to how hermit crabs find their shells (although it is indeed true that both sea anemones and bristleworms often do reside with hermit crabs in a symbiotic relationship, and in my humble opinion, I think it would make Sharing a Shell a bit better and also more interesting if Julia Donaldson would provide a short author's note to that effect). But no, I am also and definitely not in any way insinuating that Sharing a Shell absolutely requires such an author's note. For yes and truly, Donaldson's rhyming text for Sharing a Shell is first and foremost fun, rollicking, song-like and delightfully provides an entertaining and brightly, colourfully illustrated by Lydia Monks story that provides for young children a great lesson regarding the importance of sharing and being good neighbours but without this ever feeling annoyingly didactic and patronising, and leaving in particular my inner child (even though I originally was kind of expecting considerably more realism in Sharing a Shell) broadly smiling and considering both Julia Donaldson's story and Lydia Monks' artwork sweetly fun and highly recommended to and for young children from about the age of three to six.