L.
Try Laurie Berkner - she has a great style suitable for your kids and you. Our kids are 8 and 5.5 and they still dance and sing along to each song. Her website is http://www.laurieberkner.com/site/.
The link to her DVD is
http://twotomatoes.shop.musictoday.com/Dept.aspx?cp=265_2503
You can also try Dan Zanes. http://www.danzanes.com/pages/news.php