When the Power siblings decided they wanted to hand-make gelato, part of their personal war on waste, they looked to their store of unwanted books and clothes.

With the assistance of mother Rachel, Esme, 10, and Ted, 8, are running a garage sale, selling off books, toys, clothes and puzzles they have outgrown.

The pair plan to split their profits, with half going to the Asylum Seeker Centre in Newtown, where they have volunteered, and the other half to an ice-cream making machine.

Esme and Ted Power have joined the Garage Sales Trail this weekend. Credit:Wolter Peeters

They've set aside a full rack of clothes, a big box of puzzles and a box of picture books to sell, and will be one of 4900 garage sales to operate in NSW this Saturday and Sunday, with a growing number run by children themselves.