What job would you do for free?

For me nature and parents have always been an inseparable part and without them I might not be who I’m today……….
So for them I’ll do anything and for free. However do you think there is anything free in this world no and will never be for me the payment from them peace and smile they gave me. But the most important reason is the will Or reason they provide me to move forward in life without letting tension Or anxiety take over me…………
So yes in terms of monetary value I’ll be doing free job but in reality the payment I receive is just too much that even money can’t compare to…………..