A: The most common reasons to test are when you wish to publicly exhibit poultry (such as shows/fairs) and for NPIP certification. Most shows require proof of a negative Pullorum test performed within 90 days prior to the event date.
A hoverboard is a Hover converted board shaped vehicle similar to a skateboard. They were manufactured in 2015 for all age ranges by different companies. Mattel made pink and orange models with handlebars for young children.
Wired even has a piece explaining how such an hoverboard could work. According to the article on Wired because Lexus has opted for a superconductor, this creates a different kind of magnetic field, one that does not die away. You can read more on the physics of that here.