Ms Kirk says she hopes her young sons Angus, 4, George, 3, and Toby, 8 months, will embrace the pay-it-forward philosophy when they are older.
"I do it because it gives me joy to think that I have brightened someone's day," she says.
"I post a picture online and ask people to reply if they are interested."
The post stays up until a designated time when Ms Kirk randomly selects a name from the list of applicants.
"I thought I would do it that way rather than just give things to the first person who asks.
"Sometimes people nominate someone who might be too shy to ask for themselves."
She even delivers the goods to the lucky recipients, because some people don't have their own transport, she says.
Paying it forward is a concept made popular by the 2000 film of the same name starring Kevin Spacey.
However, the practice of passing on a good deed to someone you have never met is believed to be much older than that.
It may have been first conceived by writer Lily Hardy Hammond, who described the concept in her book In the Garden of Delight, written in 1916.
Ms Kirk said she had chosen a recipient for her charm bracelet and would drop it off to them this week.
