The real context is that a 7-year-old girl won an astounding $80,000 and a trip to Mountain View (Google's HQ in California) for a drawing competition organised by Google. That's a lot of money, and a lot of instant fame for such a young child to handle.
The expression used by the mother “head in the right place” reminds me of the better-known idiom "heart in the right place" but she was probably referring to the idiom: have a good head on the shoulders
Be intelligent or shrewd; have good sense or good judgment. For example, We can depend on George to figure it out—he has a good head on his shoulders. This term originated in the 1500s as have an old head on young shoulders, alluding to the wisdom of age and physical youth. It took its present form in the 1800s
Her mother is clearly more excited than her daughter "I can't stop thinking and talking about it…" but her daughter just wants to carry on drawing and talking about her day at school – “Sarah's happy to move onto the next thing” just like any other first grader.