You can find some taboo words that you can use and play in your class. You can divide the class into two groups and one by one your students can come and try to explain the word on the TOP without using the taboo words below. If s/he does not know the word, s/he can choose another one, but just three times. If the group knows the word, give them ten points. If the student say one of the taboo words, give 5 points even if its true.