The to top bunk is their personal space where they feel the most relaxed, so why not hang a picture or poster and give them free reign to add things that make it more comfortable for them. There are many products that would work as long as they are hung kind of high up on the wall, and then there are even some closed shelf systems being designed specifically for a child's top bunk.
One option for keeping the top bunk organized is to hang some simple shelves where items can be laid until your child decides to take them down. Most parents do not even think about adding organization units to this part of their home, but it is absolutely essential with children who enjoy reading or doing other relaxing activities in bed. Kids often enjoy reading in bed and doing other activities up there during the day, but most are not so great at bringing all of those items back down to where they belong in the room.
If you have bunk beds in your home, you know what a disorganized, scattered mess that top bunk can become. If necessary, purchase storage bins to go under beds or in closets. Even family pictures can be hung in attractive gatherings on a wall to clear up spaces on tables.
Light colors will make a space seem more open. Cribs now convert to toddler beds and then to twin beds that can save space in a room. Using eco-friendly paints will not affect the health of your children and give you peace of mind.
Instead, focus on creating a living space that is filled with different colors. If your children love boats and ships, you can develop a nautical theme for the feature wall. Choose colors and patterns in such a way that it offers comfort to your loved ones for years to come.