When your 7 year old decides to memorize pi and does so, by studying a page with pi written on it, to 100 digits, in 30 minutes. When she then watches a youtube clip of someone 'singing' pi and stops it around the 80th digit and points out they've made a mistake. When she then goes on to compose her own version on piano... When she can still readily recall 100 digits of pi having not recited it for months.

When you're not surprised to find your 7y/o in the bathroom reading "Musicophilia" by Oliver Sacks two hours after you sent her to bed.


When you avoid talking about any of your child's achievements with anyone except your husband.