08/15/2014 01:19 pm ET Updated Aug 15, 2014

Lessons For A 21st Century Girl: It's OK To Look Gross, Like Science And Be Brave. Just Don't Be A Mean Girl

David Waldorf via Getty Images

Today my daughter, Layla – puzzle fan, bunny rabbit aficionado and reciter of nonsense knock-knock jokes – turns four years old. I wanted to share the advice I have for her, in celebration of parenting and math and science and girls who become women instead of mean girls – and to celebrate the end my own maternal potty-accident era. At least I hope so. Mommy knows best, but she doesn’t know everything.

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