scintillating

1. ADJ A scintillating conversation or performance is very lively and interesting. (談話或表縯)生動有趣的[usu ADJ n]

You can hardly expect scintillating conversation from a kid that age. 你幾乎很難想象那麼小年紀(jì)的孩子會說出妙趣橫生的話來。