ZERO Scooter Adjustable Seat
ZERO Adjustable Seat Post with hydraulic suspension for all models 8, 9, 10, 10X.
Installation of the ZERO seats requires some screws but no drilling is required.
For the ZERO 10X, you even have the option of adding on a toddler seat so that you do not have to leave your child behind.
Here's an example of how to install the ZERO seat posts: