In the seventh Chirri & Chirra book, Kaya Doi's unique version of magical realism carries the twins through the rain, to a shop that's only open on rainy days ("what luck!"). They snack, get new raincoats, and pedal their bicycles ("dring dring!") over the upside-down rain; the day ends, of course, with a rainbow. Colored pencil illustrations and a small, landscape trim size are charming and inviting as usual. ( )