It is quite stable, my two-year-old daughter manages to ride it without falling. The two big wheels in the front help with that, making it easy to handle even for a very young child. We had another scooter with two wheels in the back and the little one couldn't take a step without falling, so we gave it to an older child :)
This scooter is perfect for little ones, good construction, foldable, adjustable handlebar height, with lights on the wheels and even a nice packaging box that has a handle to carry it like a bag.
Very good for its price, I wouldn't ask for anything more, it fully met all our requirements, I definitely recommend it...!!
Thank you!! :)