Just Spark the scooter and it can create a LONG line, you can also do designs and letters.
This is a way to create a child-safe yet fun design. I did this when my brother told me I couldn't "spark' his spark scooter. So, I just designed a way to not use the spark but get a cool effect. the total cost varies. If you have a spark scooter, It's practically nothing. But, the Spark scooters cost 65-80 dollars depending where you get them.