Hi this is my knex scooter which is easy to make in 30 seconds.It uses 14 pieces to make and it can fit in any knex car with a trunk. It is 8.8-9 cm long so it can fit in any of my knex rally cars . If you have a bike rack on your knex car it will fit on it. Please vote and follow me. If you have a 3ds or 3ds xl I am happy to trade friend codes.