Turning one person's trash into another's treasure could be as easy as filling the boot of your car with unwanted Christmas gifts, gadgets you never use or clothes the kids have outgrown.Sustainable Illawarra is holding a car boot sale as part of Spring Into Corrimal this Sunday. And with 41 cars registered to sell their wares, plenty of old things are destined to be reborn as someone's new toy.Sustainable Illawarra project manager Dee Topic said she wasn't sure what items to expect on the day."We are trying to reduce waste going to landfill so we don't want people throwing away things they don't want or that might only need minor repairs," she said."It could be anything from clothes to appliances they don't want, toys or all the usual things you might sell at a garage sale. "Exercise equipment has become a popular item at garage sales. We could even have furniture."Sustainable Illawarra has already held car boot sales in Kiama and Shellharbour and is hoping their first in the Wollongong council area will be just as successful."We thought we would take advantage of the streets being full of people for Spring Into Corrimal," Ms Topic said."We have lots of environmental initiatives on the go and really want people to see there are lots of different ways to live sustainably." The sale is from 8.30am until noon in the Tarrawanna Rd car park. Spring into Corrimal will kick off at 10am with the grand parade. The festivities will continue with market and food stalls and free entertainment in the streets until 3pm.