What is the latest age that others dc have started jumping (getting both feet off the ground at the same time)? My dd (3.5yrs) still can't and I'm beginning to wonder if I should be worried. She can walk, run, ride a bike with stabilisers. She can jump on our trampoline which is a little one with a bar to hold onto. When on that she can get both feet off the ground but she is using her arms on that bar. She is very clumsy, often misses the door and walks into the door frame, falls over when running, falls over toys on the floor, but I don't see that as being any different to some other 3.5yr olds. But I have noticed that all her peers are jumping. At ballet they do this jumping thing and all the class is jumping and dd is doing a weird stamping foot thing. Should I be concerned?