The science of SMILES
One-year-olds who take part in interactive music classes with their parents smile more, according to a 2012 study. They are also better at other early communication skills, such as pointing at out-of-reach objects and waving goodbye.
Bubs in Holland like to smile, laugh and cuddle more than those in the US, a temperamental difference that’s a result of the way they’re raised, according to a study published in 2015. American parents emphasise the importance of stimulation to promote social independence, while Dutch parents are more likely to include children in daily activities at home.