Flatpack Go-Karts? If the one thing holding you back from getting a thrilling Go-Kart is the expense of shipping then the Flatpack Go-Kart by PlyFly ($790+) can take away that added cost. Plus you can enjoy getting hands-on with your new toy by building it yourself! There is nothing quite like the feeling of taking your first corner in a Go-Kart you made with your own hands. Each kit comes ready to assemble with either a 2.5 HP or 4 HP engine. The fun is endless and available right now, so don’t miss out.