MORE INFO: DoSomething Day

Eleven-year-old Tia Brennen has a nack for restoring old donated bikes at her family's Minto home.

In the past 18 months, the junior philanthropist has given more than 300 to other kids whose families couldn't afford them.

If you would like to help Tia, click here to visit her Facebook page.

Find out more about Do Something! Day here.