Walmart offers the Blaze Monster Dome Challenge Game for $13.59 with free shipping. (Choose "Expedited" during checkout to see the shipping discount. Amazon charges the same with free shipping for Prime members.) That's the lowest total price we could find by $3, excluding the mention below. It features science, technology, engineering, and math problems.
A close price: Toys"R"Us charges $14.99 with in-store pickup.
This flu season, you can do some very simple, cost-effective things that will substantially reduce your risk of getting sick.