But don't take Japanese kids, and for the same reason, Chinese.
I'm learning chinese on my own, including writing and I didn't have to (couldn't anyway) take that course to do it. Maybe some people might enjoy japanese/chinese, so you shouldn't advice them not to take it.
Also writing chinese is the easy part. I mean in any language, the alphabet isn't the hard part. For us western, chinese "alphabet" sure is an additional barrier, but definitely not the hardest part. I've reached the point where I can read (ie pronounce) a lot of things in chinese without having a clue what it means. So I wouldn't call chinese more difficult than latin. Latin's grammar is the ****ing ****. Like we think french and italian are complex (with almost 20 verb tenses for example), but latin is even worse.
Also, I don't think learning latin because it helps another language is a good reason to do so. If you invest the time spent on latin on that other language, you'd speak even better. You really should learn latin if you're interested in the foundations of latin-based languages.