What if we extended the voting age down to zero?

How might the policies of the U.S. change if we extended the voting age down to zero?

If persons aged 14-17 could vote, and if parents got to cast the votes of kids thirteen and under?

Kids would probably attend better schools, be less likely to go hungry, and get better health care.  A relatively larger share of government spending would be on kids, and relatively less on seniors.  Healthier, better educated children would make the country stronger in the future.