From my personal side of view, as an untie, I get hundreds of drawings from my nieces. Drawings made by love, colourful, some senseless -in early ages- some with great meanings and full of pure love! These drawings I recommend you make into paintings and decorate an entire wall of your house. It can be the hall leading to your room, the playroom, you choose!
Dedicate a part of your living room totally to your children’ toys! This way you will have them in order and they will learn how to play while you can relax and enjoy a movie, cause you will share the same space! It’s your living room, not a museum! It is meant to have life!!! Make that possible in your terms!
In the exterior.. it’s wise to create places for kids to play! Near you but seperately!
Plan the children’s spaces with practicality and a sense of fun. Designs should be flexible, because kids’ needs and tastes change even fast. It’s perfectly possible to integrate a cool play space into a design-conscious home, plenty of good-looking storage is the key!