Some folks do the opposite and have extended family visit to take care of the children. One of my friends' parents joked at immigration¹ when asked what they were visiting for. "Babysitting" they smiled. They were sternly rebuked, saying they did not have a Visa that would work for employment. They did get let in, in the end, though.<p>¹ A lesson you learn very fast is to never joke while at immigration or customs.