Myer Chadstone had a photocopied flyer in front of their Chadstone store saying:
"Xmas Offers. Toys. 3rd toy Free when you buy 2 toys in one transaction. Third item must be of equal or lesser value. Excludes nursery, consoles & console games. Offers available Tuesday 21st December to Friday 24th December"
Maybe also their other stores, but it may be worth a phone call to Myer to check!