Summertime is a great time to rethink your kid's room - no matter what age your child is. If your child is old enough to be involved, do it together. He/she will understand the system and be more likely to maintain it.
You'll want to purge, make the room functional based on your child's interests, and create a system. The hardest part is setting aside time each day for your child to maintain the system.
If your child has lots of little items, an inexpensive way to house them is in plastic see-through shoe boxes you can buy at the dollar store. He/she can label them or draw a picture to identify the contents of each shoe box. The shoe boxes can stack neatly on shelves. And the shoe boxes make the contents portable!
If you need help creating functional areas or maximizing space for kids, our Three Steps to Organizing Your Child's Room (http://1-2-3getorganized.com./books.html) will get your idea juices flowing!
Thanks for visiting my blog. Hope you find some helpful hints for organizing your time and space. My passions are to help you make home a refuge instead of a crisis center, and to help you function in peace rather than chaos - at home or at work. I have switched my main blog to 1-2-3 ... Get Organized on WordPress, so please visit me there.