Hi there Laura,
Chinese teenagers love their computer games, do you have multimedia equipment and an internet connection in the classroom? There are some interactive games here, but also there are some activities you can print.
Kids ESL Games - Free Online ESL Games, Worksheets and ESL Printables for ESL Young Learners - this one has some cool interactive games
FREE TEMPLATES - Games, Ready Made, Abstract - for Presentations in PowerPoint format - this one has some cool games
Stu's Quiz Boxes! - here you'll find a jeopardy game you can download for free. The teachers I have trained have loved this one.
You can find some more free resources on these sites
Free Printables for Teachers | flashcards, printable games, worksheets templates, phonics materials, ESL printables, conversational activities Teachitworld - Teachitworld English language teaching resources - ELT resources online
Hope this helps.
Cheers