Custodial ROTH IRA for child

My kid is 6 years old and earned some money around then neighborhood.

 

1) Do chores count toward the 6k max annual? Can I include those in the ROTH IRA contribution for the kid

2) Does the funding have to come from his bank account

3) Where do I report on TT that he has a ROTH IRA contribution as he is my dependent

4) DO I need to file a tax return for the kid?