For willing family members, we teach mouth to stoma during their discharge CPR class. But, we usually send home a BVM with an infant or pedi mask that fits over the stoma with the patient. This is usually the same set up you will find in nursing homes or at the bedside in hospitals along with appropriate tube.
If they have an laryngectomy tube, it probably will not have a 15 mm adaptor and will need to either have the adaptor inserted or the tube changed. Some patients may also have a valve used to facilitate speech between their trachea and esophagus which can become dislodged. The fistula may be open to where stomach contents can enter the trachea or cause gastric insufflation.
A pediatric patient, usually in a chronic vegetative state, who has had a permanent opening made to prevent aspiration with the trachea brought forward to make the stoma opening, same as in adults, will probably not have a fistula between the esophagus and trachea to be concerned about.