Whats a minimal age to take part in the tour?

To ride a segway in Prague there are no age restrictions. But the weight of the rider should be more than 30kg.
To ride a e-bike the minimal age is 10 years. We have some with low seat so it would not a problem to ride.
To ride Trikes driver should be 18+. As a passenger on the rear seat kids 7+ can go on tour.