Good idea for memories over the school years. Make one for each child and then add hanging folders that say "Pre-K through grade." Save things that come home during each school year (report cards, drawings, certificates, good grades, etc.
A reward points system to help motivate kids to do chores happily, quickly, and well. Kids earn points to shop at the "family store" Points can also be earned for positive behavior, sharing, helping and good manners.
What a good idea- Clutter Jail. If the kids leave it out, it goes in the clutter jail and they have to draw a card out of the community chest and complete the task to get their stuff back. Great way to teach responsibility.