Research by Professor Barbara Fredrickson and her colleagues has found that people who feel more positive emotions, like joy and gratitude, have better coping skills and see more possibilities in life. The research has shown that this can improve people's health and may even help them live longer. So having fun should come first - it is really important for children's long term health and fulfilment! And ours too!
Fredrickson, B.L. (2009). Positivity. New York: Crown Publishers.