I noticed a promotion on a packet of Viva paper towels I bought the other day for free entry to certain zoos in Australia. The offer varies by zoo: VIVA Paper Towel zoo ticket offer website. You need to take the coupon from a pack of Viva paper towels to the zoo and then you can get one of: Taronga Zoo: Buy one full price adult ticket get one child ticket free Taronga Western Plains Zoo: Buy one full price adult ticket get one child ticket free Healesville Sanctuary: Buy one single entry ticket, get one free Australia Zoo: Buy one single entry ticket, get one free SA residents can go in a draw to win $50 cash to spend at any zoo of their choice WA residents can go in a draw to win a Perth Zoo Ticket Pack (2 adults and 1 child ticket) valued at over $50! There are terms and conditions listed on the website linked to above.