回复：紧急求救,下个星期去加拿大旅游, 发现小孩的美国护照都过期了.

It should be okay. We did last October when my son's passport was 2 months over due. I said I did not know. They let us pass.

Back to USA, we did not even were asked.

If you drive your car, you are safe. They check your license plate.