Examining the way other countries use language, and in particular aspects of language that have been passed down from generation to generation is never anything less than fascinating to kids - who may hear their parents, grandparents and even great-grandparents using strange idioms and phrases that sound odd to their young ears, but are cool to adopt and use nonetheless.
"I'll Believe You When..." by Susan Schubert and Raquel Bonita begins with that simple idiom, and shows how other countries use their own unique take on it.
From the UK to the Netherlands, from India to Russia, everyone has their own version - and some are just so much fun you'll end up pinching them yourself!
"When Pigs Fly" is a well known one but how about "When the stork turns black?" or "When Cows Dance on Ice?"
"I'll Believe You When" by Susan Schubert and Raquel Bonita is out today, published by Lantana (kindly supplied for review)