Here are a couple of cool hoverboards for Back to the Future fans. The NeoLev Tiny Hoverboard comes with a 8-inch half pipe base and levitates 0.5″ above it. It has acrylic support plates. It works based on the principle of magnetic repulsion.
The Back to the Future II Levitating Hoverboard Set from Kids Logic is an electromagnetic desk toy. It has a levitating base with LED lights. This kit has multiple hoverboard designs for you to try.