It’s no surprise that kids in the 1950s went wild for this sugar-coated breakfast cereal. Kellogg’s Sugar Frosted Flakes, which went on to be called Frosties in the UK and Ireland, launched in 1954 and were an instant hit thanks to an ingenious marketing campaign using legendary mascot Tony the Tiger and his famous catchphrase: 'They're gr-r-reat!' Despite modern trends against sugary cereal, it remains a bestseller.