BabyBjörn BB® Toilet TrainerWhy is the toilet training seat a clever choice? Because the toilet training seat is stable, safe and comfy, while its easy for your child to put on the toilet unaided. Thanks to its rubber edging and the adjustable dial underneath, the seat stays firmly in place and the splashguard prevents spills. You can hang the toilet training seat from its practical handle when not in use. When can my child start to use the toilet training seat? From the age of