DS has been trained and reliable for months but still needs help with his trousers because the stepladder seat thing we have isn't stable enough. Tried the seat from our Thomas potty but the step isn't tall enough for him to get on. Need a tall step as he is only just out of 18 month old clothes! If he isn't wearing anything on his bottom half he will take himself and wipe so it really is just the step stability and height issue with the trousers!