Each square has a braille number on it. Each number has an item or a need connected to it. Danny knows which number says what. He pushes the braille number and a prerecorded voice will speak for him. By having these different systems, Danny is more accessible to the world around him and it to him.
Technology can also make our children's world safer.
He can distinguish between a bus or car that may be in front of him. One other piece of equipment that he uses is the silent pager. This item has three different vibrations that will tell him if there is an emergency. It will vibrate one way for a fire alarm, another way if his boss needs him to come to his office, or a third way for any drills they may be having at work. Technology is invaluable.