Review on Hiboy Hoverboard Balancing Accessory: Enhance Your Ride with the Perfect Attachment by Brent Saake

I bought two of these for my kids for Christmas but none of them work properly. I bought a different brand for my older one and it works great. These two are missing a part or are defective causing them not to balance on the boards making it impossible for the board to move. Huge disappointment on Christmas morning for 2 of my 3.