The experiments this op-ed describes are really neat. I especially like the one that demonstrates the importance of "practice what you preach." Here's another cool experiment related to social/moral development, which you can perform on your own kid: Have two grown-up friends each show your baby a toy. The first friend should offer the toy to your kid but then retract the offer and keep the toy to himself. The second…
Who would have thought that 21-month-olds are predisposed to Kantian ethics?
Hint: its true even if babies haven't figured it out yet.