Parents should guide and supervise their children when using stretchers to ensure their safety. Here are some suggestions:

1. Choose a stretcher suitable for your child's age and height, and the appropriate weight.

2. Before the child uses the stretcher, explain to the child how to use the stretcher correctly and how to maintain the correct posture.

3. Monitor the time when children use stretchers to avoid overuse.

4. If the child has any discomfort or pain, stop using the stretcher immediately and consult a doctor.