Question: how tweens can make money?
Answer: Work as a 'mommy's helper' In the past, middle-school-age baby sitters were the norm. ... 
Help a local senior. This was actually one of my earliest jobs. ... 
Open a lemonade stand. ... 
Do yard work. ... 
Walk dogs. ... 
Pet sit. ... 
Provide tech support. ... 
Wash cars.