Children don't dare to practice their ideas because they are afraid of being punished for not obeying rules.

孩子们不敢去践行他们的想法，因为他们害怕因不遵守规则而受到惩罚。

由“because”引导的原因状语从句。主句是“Children don't dare to practice their ideas”，其中“dare”在这里是实义动词，“dare to do sth.”表示“敢于做某事”，否定形式借助助动词“don't”。 - 从句“because they are afraid of being punished for not obeying rules”中，“be afraid of”是固定短语，意为“害怕”，后接动名词形式“being punished”，这里是动名词的被动语态，表示“被惩罚”；“for not obeying rules”是介词短语作原因状语，“for”表示“因为”，“obeying rules”是“遵守规则”，“not”对“obeying rules”进行否定。