APPLETON - It was all smiles in the Fox Valley Sunday.
It's part of the International Happiness Week going on at The Building For Kids in Appleton.
Throughout the week, people took part in different projects and crafts.
They could also sign a giant "happiness wall."
Event organizers say finding that inner happiness is crucial.
"I think it's very important to make sure we have kids focusing on what makes them happy on a daily basis, reaffirming in life that it doesn't have to be materialist things that make you happy," said Carey Behnke with The Building for Kids.
Organizers say it's important to start teaching what happiness means at an early age, so that it continues later on in life.