Windows can allow entry of natural light and air. But if you think your bathroom doesn't have enough ventilation, you can consider using an extractor fan. You need to choose the right size for the fan and you can do this by getting the volume of your room. Your room volume will be multiplied by the number of air changes needed in an hour which is 20 for bathroom. Then you purchase a fan that is appropriate for your bathroom that could provide the needed flow rate of air.
The lights also add a dramatic touch to the room making the concept achievable. The contrasting character of dark and light colours adds elegance and sophistication to the room. The eye-catching glossiness of the cabinet doors in brown color well-complements the textured wall on the other side creating a visual balance in the room.
Designing a kid's bathroom could also be tough at times. But after seeing the result, you will surely be as pleased as your kid. You don't really need to hire an expert to decorate but if you are too busy for that, you can also look for someone to do all the decorating for you. If you will do it all by yourself, here are some bathroom decorating ideas for kids to help you.