高高兴兴 + 地 + Verb
高高兴兴 is the reduplicated form of 高兴 (happy), used to emphasize a heightened or vivid sense of happiness. Reduplicating both characters (AABB pattern) intensifies the adjective and often conveys a lively, cheerful mood. It commonly appears before 地 as an adverbial modifier, as in 高高兴兴地回家 (go home happily).
孩子们高高兴兴地跑出了教室。
Háizimen gāogāoxìngxìng de pǎo chū le jiàoshì.
The children ran out of the classroom happily.
她收到礼物后高高兴兴的。
Tā shōudào lǐwù hòu gāogāoxìngxìng de.
She was very happy after receiving the gift.
我们一家人高高兴兴地过了个好年。
Wǒmen yī jiā rén gāogāoxìngxìng de guò le ge hǎo nián.
Our whole family happily had a great New Year.