If you don't want to see clutter in your bathroom, have good storage spaces. You need to have storage areas for cleaning materials, medicines, children's toys for the bathroom, toiletries and others. Choose a good bathroom vanity cabinet that will not only keep your toiletries but will also make your bathroom look good. You can have a cabinet that can occupy from floor to ceiling for a wider space.
The bathroom is an important part of the house. Some adults place some vain decorations and accessories in it but if we are taking about decorating kid's bathroom, it is a different story. You have to keep things simple yet fun so that your kids will enjoy bathing and cleaning themselves. You can still accessorize the bathroom but you have to consider the safety of the kid's, too.
Bear in mind that kids are playful and are prone to slipping and bumping into things even if they are in the bathroom. Place safety products in the bathroom like anti-slipping mats and adhesive pads that stick to the bottom of the tub. Also place drain and faucet covers, you can choose covers that are also decorative. Have a cover clamp for your toilet. Just use plain white so that kids will not be curious in peeping into it and be put to danger.