Van Leeuwen’s bedtime book will probably keep kids wide awake, particularly if readers follow the example set by Grandpop. It is time for three kids to hit the hay, and Grandpop has pulled baby-sitting duty. The kids want a bedtime story and he obliges: His first story takes place on a hot summer day in his childhood, and it involves merry pranks. For the punchline, Grandpop tickles his charges, and so they plead for another story. Again they visit that hot summer of long ago, this time in the company of dancing cows that when milked deliver pails of ice cream, but only if tickled behind the ear. Grandpop proceeds to tickle the kids’ ears; thus they clamor for more stories, and it’s back to that hot summer day, which is winding down into a steamy night, when sleep was difficult to find. The kids are soon snoozing, exhausted by their grandfather’s antics. Whyte catches the specifics and the sensibility in her sharp watercolors that exaggerate the details but keep the emotions true. (Picture book. 4-8)