It’s okay, I guess, but I think a lot of kids would feel cheated by the ending:  the author may be trying to make a point, but the kids who can relate to the character’s struggles aren’t going to buy the believability of the ending.  The story opens with the announcement of the upcoming talent show, and goes through all of Penny’s attempts to try to find a talent she can showcase, and her discouragement.  In the end she goes on-stage to blow her kazoo with her dog, and she gets the award for the “Best Friend.”  School talent shows really do raise such anxieties with a lot of kids, but the reader who might be hoping for an idea to come from all Penny’s searching, are going to scoff that they don’t give out awards for such things (even if some of us think they ought to).