I'm all into simple ~ simple is the way to go! That's why I'm suggesting today that you jump rope with your kids.
Get a couple of jump ropes, if you don't already have a couple ~ they're cheap ~ go outside and jump rope together! Just remember being a kid, let go and have fun. It doesn't matter if you're good or bad ~ your kids don't care!
Jumping rope is great cardiovascular excercise plus it works your upper and lower major muscle groups. So, get out there and have fun!