Final answer:
The nurse should give a teaspoon of honey and prepare to administer glucagon subcutaneously if unconsciousness occurs. The child should be encouraged to eat a high-protein meal.
Step-by-step explanation:
The nurse should implement the following interventions for a child older than 2 years with type 1 diabetes mellitus who has a blood glucose level of 60 mg/dL (3.4 mmol/L):
- Give a teaspoon of honey to raise the blood glucose levels.
- Prepare to administer glucagon subcutaneously if unconsciousness occurs.
- Encourage the child to eat a high-protein meal to help stabilize blood glucose levels.
It is important to note that insulin injections are not recommended in this scenario, as the blood glucose level is already low.