Summer Language for Kids?

I was thinking of bringing my kids (11-year-old boy-girl twins) to Taiwan in July. I think it would be a great experience for them in general, and I’d like to enroll them in a language program. In particular, the one at the Mandarin Learning Center of the Chinese Culture University looks good (

Does anyone have any experience with this program, or any recommendations for other language programs? (If it’s relevant, we’re a Caucasian family; I speak Mandarin passably, and my kids know a few expressions.)

Thanks in advance!