Shells are cool, but these kids are basically obsessed with them. One of the last pages says, "When friends come in/to play on rainy days/we show them all our shells./We tell their names,/just where we found them,/and all about the day/the waves ran up to meet us." These children must be the most boring people to hang out with! "You want to look at my shells again??" No, no I don't want to look at your dang shells! Don't they like, play? Like normal children? "Shells... shells... would you like to look at my shells?"
Message
Shells are the most amazing things ever.