Five minutes isn't long, is it? Will you be really teaching actual kids, or just demonstrating what you would do in the interview?
If it's real kids, I'd probably do numbers, as it's easier to vary what you present depending on what they already know. Do counting up with fingers, then if they can reach ten already try going up to 20 and/ or counting down. There are then loads of other things you can do like songs, storybooks, TPR games (counting and touching things in the classroom, growing bigger then smaller while counting up and down, etc). Some more ideas of mine on Teflnet's sister site here:http://edition.englishclub.com/tefl-art ... s-1-to-10/
Let me know if you are thinking of sticking to body and I'll look at your lesson plan more closely, but first thoughts are only time for one point (i.e. no actions), "shoulders" isn't among the first things I'd want to teach, TPR better than flashcards, and they might not be able to read.