Do extra chores, such as cleaning up. loading the dishwasher or just helping out around the house... of course it depends how generous your parents are.
use your money properly
Yes.
By mowing a yard or hustling your parents. (that's What i did at that age)
if he mows lawns or shovels snow.
Make a lemonade stand.
The boy is 9 years old and his sis is 18 years old
Lemonade stand.
Sell lemonade on a stall.
It is certainly possible for it to happen. As long as the boy has reached puberty, it is possible.
13
if you have that type of feelings for a boy then you could
Babysit depending on how old they are (12-13 years is about old enough)