You really know the answer.The only hip hop those kids are ready for is the Bunny Hop. If you have to teach the class make it as creative as your creative ballet. Let them move to the music! Kids this young are not ready for formal dance training and you run the risk of hurting their bodies if you try and force them into unnatural positions. Focus on games such as Hokey Pokey with a beat. So much of good hip hop is quite suggestive. Resist the temptation to make them move like 17 year olds, no matter how “cute” some people may think it is. And find a studio to teach at that understands child development.

I really wish these types of classes were around this area so that my son could be in them. Try looking on youtube for videos, maybe you can find some ideas.