A:AnswerMy son is 11 years old and my friend's children are 13 and 15 and they were all able to have fun on it after a very short learning curve. Center of gravity is low so it is easy to balance. Safety gear (helmets and pads) are highly recommended as the wheels are much smaller than a regular bicycle, so sudden twists on the handle becomes sharp turns. At high speed that will lead to a lost in control so they have to learn to change directions by leaning. There are 3 speed settings so use it to match the rider's skill.
A:AnswerThis is not an item that should be left out in any of the elements whether it be cold or rainy neither should you ride the vehicle in any type of inclement weather.
A:AnswerMy son is almost 8 and the brake is very easy to use. There is also the more common back foot brake if the front thumb operated brake isn’t to his/her liking
A:AnswerI've taken the control display off. It doesn't seem to have any sort of gasket or protection against direct water. I would advise against riding it in direct water exposure.