Joanna
I have not seen the Tae Bo Junior tape but my second grade daughter's PE teacher had the kids do a Tae Bo Live Basic one day for gym. She loved it! She has some Tae Kwon Do experience, though, she was in it for about a year and had her yellow belt. I don't know how form-conscious she was while in TKD or if it helped her form doing Tae Bo. I assume that you are concerned about the safety issues? I think if your kids go through the instructional tape you could feel pretty confident. For one thing it is designed for kids, for another kids are a little more resilient than us oldies-but-goodies! BTW, my oldest is 8, and her 4 year old little sister is excited about Tae Bo and also wants to start Tae Kwon Do! I imagine that Billy's motivation and personality would be very appealing to kids.