Hip-hop dancing?

well something easy is popping...which is also basically the heart of hip hop. Try having them push out their ribs, and them pull them back in...thats a very simple contraction. You can also do that with your head, hips and . Also you could try a body roll. so you start with your head and basically stick it out, them roll down your body trying to do the same thing with each of the other seperate parts.