Boards are platforms Fantage avatars stand on. They are just like hover boards! They can be bought at Board Shop (Loco Boards) owned by Michael, and occasionally Vintage Gold.
From the start of Fantage, boards used to be known as Hover boards, but now they are just called Boards. You get two free boards when you join Fantage for the first time. Charity events with group items can often also get you free boards.