Land of Another Sun — Sheila Kelly Welch

One hot August afternoon, Geremy and his neighbor but not-quite-friend, April, are sitting in the vacant lot, feeling bored.  All the other children have already gone to play the usual games.  Then April announces that she's going to blow the biggest bubble in the world.  Geremy is certain she can't do it, so he's amazed to see the green bubble grow and grow.  Overwhelmed with jealousy, he lifts his cat, Fluff, toward the monstrous bubble, assuming her sharp claws will pop it.  But he's in for a big surprise!