lighthearted
adjectiveUK /ˌlaɪtˈhɑːtɪd/
US /ˌlaɪtˈhɑːrtɪd/
Happy and not worried about anything.
The children were lighthearted and laughing all afternoon.
OTHER MEANINGS
2. Not serious; treating things in a fun or joking way.
They had a lighthearted chat about their silly mistakes.
3. Free from sadness or trouble; cheerful in mood.
Her lighthearted spirit made everyone feel better.
4. Done for fun rather than as something serious.
The movie is a lighthearted comedy for the whole family.