Soon, I will need to give a 30 minutes, kindergarten/elementary school demo . It should be designed for children what color is it? It is red and What is it It is Coffee. Students can not speak chinese in the class. I am trying to think of some ideas for a short lesson. 

Also, I think it would be much easier if they had some basic knowledge... I always feel awkward  that they dont know much. Any ideas on a how design a basic level kindergarten/elementary esl demo lesson and any tips or suggestions.