I have a blog where (at times) there is content not suitable for kids, so I'd like to add a warning in Thai.

Is this ok?

คำเตือน! คำ ไม่ เหมาะ เด็ก

Warning! Words not suitable for children.

Or should I say the age? Under xxx?

It's not X-rated. It's just including subjects not for little ears.

Wikipedia uses this phrase เนื้อหาไม่เหมาะสมสำหรับเด็ก Literally, content not suitable for children. I'm pretty sure that this is how they phrase it on TV as well.

Thanks for this

I found a phrase on YouTube but it didn't quite seem right to me.