Re: Disneyland Adventures, I have a friend who got 1000gs in it. He enjoyed it. He said it wasn't too hard, but very time consuming, like 60 hours to complete because of many activities to complete. So if you're a completionist, just be aware.
Re: Junk Fu, this TA solution
gives a method for fooling the game without too much effort. Basically, you sway a towel back and forth at waist level, I'd say at a slow-medium pace. I've gotten over 50 calories every time without much exertion. Incredibly boring though; I'm having a much better time with Kinect Sports 2.