他曾经是一个问题小孩。

He used to be a "problem child".

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对于小孩子来说，“你今天学到了什么？”可能只是一个简单的问题。

For a young child, it may be just the simple question "What have you learned today?".

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有时小孩子可能会过于兴奋和有点过于粗暴，但这从来都不是一个严重的问题。

Sometimes a young child may get over-excited, and they are a little too rough, but it's never a serious matter.

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