Books by Chris Ferrie, Veronica Goodman

2. Chris Ferrie and Veronica Goodman, ABCs of Economics (Baby University) .  Is this for a 5 or 6 year old?  It seems good to me, though perhaps the part where they teach “Nash equilibrium” is a stretch.  I say calculus should be available in the fifth grade, stats in the eighth grade, so full steam ahead.