My son was slow to roll, sit etc. He still is reluctant to sit without support although he can do it for a very short period (a few seconds). He hasn't crawled at all yet. Part of the problem has been that he's had a flattened head so I've been reluctant to put him on the floor because he just flips on to his back - and I don't want to make the head worse. His hand-eye coordination is good and I don't think he's generally stupid so I suspect I just need to do things differently..... If I sit him on the floor he just lies back on the cushions that I have put behind him. He clearly thinks that is more comfy...! Any ideas for stopping him do this?