Yes, even though they were only three years old, the three babies she had given birth to were already sensible enough to know how to take care of their grandparents.
When they were at home, the three children would pour water for their grandpa and grandma and bring their medicine to them. If they weren't feeling well, they even knew how to call for someone to take a look at them.
The more obedient the three children were, the more reluctant the elders were to leave them.
However, Zhai Yaohui and Miao Jing were already in their seventies. The triplets were only three years old. Sometimes, Zhai Yaohui and Miao Jing wanted to treat the three children well, but they were strong in will but weak in power. Take today for example. Accompanying the children out to play was the furthest place that Miao Jing could travel to now.