The eighteen month mark is a significant one in my mind. It feels like it's the change from baby to toddler. Previously I would hold Otis (have him on my hip) as he brushed his teeth, so that he could see the mirror and often I would brush my teeth at the same time. Previously his mirror was in his room, but now the two boys are in the same bedroom there is no room for it. We have recently put his mirror in the bathroom and made some additions to make teeth brushing easier.
Along with the low mirror we have used some accessories (they are temporary and movable using suction to adhere to the tiles) - a basket and towel ring. It's easier for Otis to access his toothpaste, hairbrush and hand towel.