As a parent, and assembler of the HoverKart, I was very disappointed that there were no assembly instructions for this device. In the box we had the details for an actual Hoverboard... not really useful, perhaps an oversight by the supplier? The screws to adjust the bar length which clamps to the Hoverboard were so tight that in trying to adjust them some of the heads rounded off, again not great! My son who received the item as a gift was thrilled and loved it, cant get him off it, which is fabulous as it gets him outside! So my review score is based on his delight (5) vs my assembly frustrated (3)