The pell mell pace at which Nina gets ideas, and her desperate attempts at organizing what she needs to do are a good lesson for readers, not only as a cautionary tale (a lot of her plans are very ambitious!) but as a constructive lesson in how to approach problems. While I found it hard to believe that there would be enough children in the neighborhood who would be allowed to go in the Soni's basement to make this a profitable venture, the situation is realistically drawn, and Nina works through all of the challenges of such a daunting project.
Halloween figures so largely in the calendar of elementary school readers that it is always good to see a book that incorporates it. There are several delightful series that include this, such as
Brown's Lola Levine and the Halloween Scream, Warner's Absolutely Alfie and the Princess Wars, Harley's Charlie Bumpers vs. The Squeaking Skull and even Sells' graphic novel Roar of the Beast, so it's good to see this addition to the Nina Soni series.