While Jon's grandmother naps, she leaves him to look at an old photo album entitled Paul's Fantastic Photos -- 1915. Bored, Jon finds the pictures ""gloomy""; even after he hears Paul's voice calling from a framed photo of him, climbs into it, and joins the boy in the earlier time, Jon sees everything there as gray. Paul, however, knows that ""Pictures can come to life,"" though ""it takes a little practice."" The two visit several more scenes from the album before Jon, now convinced, makes a dive that lands him back in the fullcolor, but no more lively, present. A quiet story, but one that many young readers will find intriguing. Essley's appealingly nostalgic illustrations are distinguished by delicate modeling and carefully balanced composition. A creative introduction to time travel -- and to the way that ordinary-seeming remnants of the past can become windows into a once-vibrant time.