A recent study finds that kids are happiest and most carefree at age seven.
The study, commissioned by Vaalia probiotic yoghurt as part of a fundraising, campaign for the Murdoch Children's Research Institute, found that joy, energy and innocence reach a high between the ages of six and nine, before kids start worrying about their looks, what their pals think and how well they do at school, News.com.au reported.
Dr Justin Coulson, author of the study of 1014 parents, believes age 7 is 'the perfect blend of childish enthusiasm and innocence.'
He said that most kids have boundless energy and lust for life - something that starts deteriorating as they become older and perhaps more jaded.
Coulson added that by the age of 11 or 12, kids start to worry about body image and stress over school and friendships.