Picture: Sebastian Fritzon, Flickr

If you've ever taken kids shopping, you'll know all about the tricks designed to get them nagging for stuff they don't really need. The lollies and toys positioned at eye-level; The alluring packaging; The must-have brand-names; The impulse items in the checkout aisle.

Maybe you just accept it as one of the perils of shopping that you can't change. But one mum who believes it doesn't have to be this way, is Tanya Andrusiak. She's the co-author of "Ad-Proofing Your Kids",  a handbook to help parents navigate the murky waters of children's marketing. It's got everything from games that teach kids about advertising trickery; to a guide for handling supermarket tantrums. Hear Tanya's advice