<p> Balloons are bright and floaty and shiny and <i>perfect</i>. </p> <p> More than anything else in the whole wide world, Isabel wants a balloon. Everyone will get one on Graduation Day?everyone except the porcupines, because Porcupines + Balloons = Trouble </p> <p> But Isabel isn't going to settle for another boring bookmark. She has a plan. . . . </p>