I highly recommend trundle beds or a daybed with trundle for children. That way you have room to accomodate both sleepovers and out of town guests. Unfortunately you will not be able to accomodate a married couple with a double/queen bed unless you let them use your room, but I feel that separate bedrooms for opposite sex siblings are much more important as they get older.

Your carpet is very neutral and about the same color as hardwood floors would be. Just consider the floor background and ignore - your vibrant furnishings will be the eye catchers. The owls are adorable, but what about a dark blue buffalo check instead of black and white to coordinate with it?this is serena and lily, but there are lots of places with different blues this is grandin road

"And also where the light isn't directly exposed, so kids won't hurt themselves." If the light "isn't directly exposed" it has to be installed inside something. What is that something? What's wrong with an LED wall light? Do you think they're dangerous?

What about these ? 2PCS Bed Risers Furniture Riser Heavy Duty Bed Lifts in Heights of 4Inches (add Height 10cm) https://a.co/d/gBfS866