A simple, upbeat story that reviews a typical kindergarten experience while presenting the colors. Andrew's class has ""Red Day,"" ""Yellow Day,"" etc., when the kids bring something of the appropriate color for show-and-tell time. Books, toys, jello, blueberries, and a daffodil are cheerfully shared; then, fortuitously, a real rainbow appears at the right educational moment, inspiring Andrew to a classic work of kindergarten art. The lively, well-observed drawings on the text pages are as appealing as the full-color art facing them. Broad borders in appropriate colors emphasize the basic lesson, while patchwork endpapers are a subtle reminder that the spectrum embraces many intermediate hues. Unpretentious fare but right on target.