My ds tells me wee and toilet then will run into the toilet and place his little stool in front of the toilet stand on it pull his pants down and tilt forward like he is weeing but if you take his nappy off he cries and runs. Is he not quite ready or what?
Its a really good sign so keep up the familiarisation. Keep it light on and as fun as possible. Reward him for participating in the process, such as what you described - even if he doesn't do a wee. It will pay off in the long run. Good luck!
DD is 3yr 8 months - DS is 6 months