Last night I accidently got the cheif to point out a new item to a child. I tried again, and it said "can only do once in twenty four hours".

I've tried several times tonight, but she lectures, tells stories and says "can only do once in twenty four hours".

What is it that I did the first time? What do I need to do for her to know that I want her to point out new items in the collections instead of all the other things she likes to do?