Kids love music. They also love to move and wiggle, and best of all, dance! And of course it is easier to dance along with music, than without music. Here are some fun variations that you can do, instead of just normal dancing.
1. If you have a full length mirror, bring it out to where the dancing is, and let your child watch themselves dance. They will love making the person that they see move, even if they don't quite understand that it is themselves yet.
2. When I was a kid, we had a cassette tape (remember those?) that had all sorts of music activities on them. It would tell us to dance like an elephant, very slow and deliberate, and there was even a song that was very fast and we would run around in circles until we fell to the floor laughing. Try something like playing "Flight of the Bumble Bee" and have you kids pretend to be Bumble Bees. Better yet, turn on Fantasia (the original) or Fantasia 2000 and have the kids dance along with the animals/people/etc. that they see. The whale song should be interesting - better get the camera out ahead of time!
3. Dress up like princesses, gypsies, belly dancers, etc. and find some music fit to dance to!
As always, there's really no limit to what you can do, imagine, or create. What type of dancing/movement activities have you done with your children?