I have 2 boys & they were easier to train than the girls. I use a water bottle wrapped in pee pad as a marker for the boys. Didn't even have to teach them to go there, they just naturally used it. 'ohhh dat's my spot'
I had an issue w/the girls going on the edge & the bottom of the pee pad would get wet along w/the bathroom floor. That drove me bonkers loll! What fixed the problem was simply making the pee area larger. Oh & after using washable pee pads, we hardly had any accidents...but did have to remove all rugs, they can't tell the difference!