兴高采烈 --------- in great delight

例句：
A: Does your child like dogs?
你的小孩喜欢小狗吗？
B: Yes, he does. He will be in great delight to scamper about as he sees a dog.
是的，他喜欢。一看见小狗，他就兴高采烈地蹦蹦跳跳。

同义词：
in high spirits
elation
in great form
rapture

注释：
scamper about 蹦蹦跳跳