DS is 2.5yrs. We have had attempts at toilet training a couple of times but have quickly realised he wasn't ready. It's been a few months since the last attempt so I thought I'd try again today. He wet himself and I went to put him on the toilet right away but he just will not sit on it. We have a step and toddler seat on the toilet for him and we also have a potty but whenever I try to sit him on them he arches his back and refuses. He won't sit down on his own accord either. How can I get him to sit down on them? He sat down ok a few months ago but now is more interested in running around. Any advice?