Flensted mobiles are designed for perpetual motion and this simple mobile gently floats around all of the time. It is just 2-D card bunnies on cotton thread but it has to be light and perfectly balanced for it to move around as freely as it does. It's suspended by a single thread and is easily adjusted to the height you need to keep it out of reach. I bought it for my newborn as I didn't want one of the bright noisy ones over her cot that you need to keep starting off. She's 20 months now and still loves watching it and blowing it to try to make it go faster.