Gradually introduce different objects encouraging the child to overcome the obstacle independently. Introduce the child to walking in crowded areas progressing from small numbers to larger crowds. Dangerous objects are another hazard. The child needs to be taught about fire, heat, hot water, electricity, sharp objects, poison, etc. if independence is to be achieved. These are necessary to the child with no usable vision as, once they are out of contact with another they become very insecure.
Boundaries are important if the child is to learn independence.
Too often the child who is deafblind is over-protected and loses out on a lot of fun. Take the child across country, uphill, downhill, across stones, through streams. Always have a purpose for a walk, even if it's only to visit the pet rabbit. Never walk for the sake of walking, the child is too young at this stage to be motivated by this. Pause at kerbs.