Little girl ( with 2 moms) is helping put up a tent. O-ring gets lost, they have to find it to finish tent. They find it under the dog!

From Amazon: While there is a growing need for books that feature nontraditional families, this one doesn't fill it. Evan lives with Mama Dee, Mama Gee, and their dog, Anna Day. When he and his two moms try to assemble the tent Evan has received as a present for his fourth birthday, they can't find the O-ring that is necessary to keep the poles up. After much searching, the boy discovers that Anna Day has been lying on top of it all along. Small full-color photos framed in black on a blue blackground are set off nicely; they are well balanced but visually uninteresting. The slight story is told in short, choppy sentences devoid of any lyrical quality. Evan and his mothers tell the story of the O-ring every day "for a long time," but the children who read this story won't remember it beyond the last page. Marianne Saccardi, Whitby School American Montessori Center, Greenwich, CT.