根据具体语境来表达，我有以下几种说法。

1) Your idea?

2) What do you think of it?

3) How about your idea?

4) Your opinion?

5) What's your idea?

如果你是想问别人还有没有别的想法，可以说what do you think?

如果是你已经给出一个方案，问别人对你方案的看法，可以这么说what do you say?