In Stella, Star of the Sea (which won a Governor General's Award for illustration), the gifted picture-book artist introduces the irresistible duo of Sam and his spirited older sister, Stella. "Stella and Sam were spending a day at the sea shore," Gay begins this playful celebration of summer, adding, "It was Sam's very first time." Stella is an adventurer, eager to dive to the ocean floor, tame sea horses, and dig a hole to China, but her little brother, Sam, is made of more cautious stuff. When Stella, looking out at the sea from the top of a delightfully round sand dune, exclaims, "Isn't it beautiful, Sam?" he observes with a characteristic deadpan, "It's very big... and noisy."

Gay humorously contrasts the children's impressions of the sea in pictures and dialogue that capture Sam's experience of its frightening enormity, as well as Stella's joy in its secret treasures. To fend off the prospect of a swim, Sam keeps asking Stella anxious questions like "Does a sea horse gallop?" Stella's replies are as authoritative as they are imaginative: "'Yes!' cried Stella. 'And you can ride a sea horse bareback.'" Gay's whimsical watercolors show Stella swimming alongside tropical fish and holding onto the back of a child-sized pink sea horse, while Sam hangs behind, a tiny speck in a water ring on the distant shore. Ultimately, of course, Stella's irrepressible enthusiasm wins over Sam's sober hesitancy, and in the final image of this charming picture book the two of them float happily in a luminous blue green sea.