She might not be able to change the world, but she can brighten someone's day.
Ask almost anyone who has met Jessica Munn at Murray Bridge's Anglican op shop, and they'll tell you they feel better than when they went in.
She is always up for a chat, a hug or a sook, say the women who meet regularly at Cafe Fay, a coffee spot nestled among second-hand books and clothing in the old church hall.
She would give you the shirt off her back.
After helping a steady stream of customers, the subject of the conversation joined in to speak about the biggest problem facing Murray Bridge: nobody had any money.
"Kids miss out on stuff because their parents can't afford it," she said.
"There's a divide: there's the rich and the poor.
"People are spending their money on drugs, and these poor suffering kids – they deserve the movies and iPads and games and the rest of it."
So the op shop offers them, dirt cheap.
On the back of Ms Munn's hard work, there are also backpacks for children and daily essentials for women fleeing violence and neglect: the colouring books and DVDs, shampoo and toothbrushes that could restore a sense of normalcy to a life in complete upheaval.
Despite the busyness of her own parenthood and the drive from Mannum, Ms Munn comes every day the shop is open to take joy in the joy of others.
"I've got a family, I could possibly get a job that pays, but this is so rewarding," she said.
No-one's past traumas could be erased, but she hoped a hundred positive actions would help build a society in which everyone would be willing to look out for each other.
"Nobody can change the world, but if you're not willing to take that first step, when's anyone going to get anywhere?" she asked.
"Where do you start?
"Here at the op shop, by giving kids free pinwheels."
- Opening hours: 9am-4pm Thursday and Friday, 9am-1pm Saturday at St John the Baptist Cathedral, 8 Mannum Road.