PreS-Gr 1 On a summer day, a city family leaves the hot pavement and sweltering apartment behind and heads for the countryside and a day of cooling off in the swimming hole, fishing, and enjoying a leisurely day together. Florian's flat, full-color illustrations are filled with detail and yet are simple and uncluttered. In contrast to the muted, cool tones found in his companion volume, A Winter Day (Greenwillow, 1987) , he now uses the colors of summerbright blues, sunny yellows, and yellow greens, making readers feel the heat of the day. It's a warm, comforting story, told in rhyme, with no more than two words per pageperfect for reading to toddlers and for children just beginning to read. Trev Jones, ``School Library Journal''