If you are afraid of your young ones getting hurt themselves while trying to get down your stairs by themselves then you should probably consider buying Babydan Wooden Flexi Fit Safety Gate.
It fits in to almost any opening as the wall fittings can be turned to fit any inside or outside your door frame. It can be operated in to both directions and it’s suited for openings of W72.1 – 110.9cm. Comes with all the necessary accessories needed to make sure it fits in to your opening perfectly. Suitable for kids up to 2 years old and priced at £29 a piece is an essential investment if you are in need of this one.