How about me telling Callie how to unlock the door and she was extremely grateful.
Did you do that? Oh wow, I bet she was happy! What made you decide to teach Callie how to unlock the door?
I wanted to see how long it would take her to open it, and I wanted to see if she'd get it right.
It is good to help people with things they are having trouble with. If you can teach someone something, such as how to unlock a door, you should do so. They will be grateful and you will have been helpful.
You can say that, but I loved seeing the effort that Callie has gone to, just to unlock a door.
You taught her right. From now on she will know how to protect herself from strangers or intruders in the house.