Less clutter is the least of the benefits to keeping only a small portion of your kids' "creations." Consider these benefits to your child's creative and psychological growth.
1) Kids who get the message that everything they make is wonderful are less inspired to create new and different things. Stop saving every last scribble and encourage your child to keep experimenting.
2) Kids who learn to distinguish between passing fancies and truly special things are more likely to mature into financially responsible shoppers and less likely to need an Organized Living Coach like me to help them wade through their clutter. Engage your young children in a conversation about which of their objects is most special - and why.
3) We are a culture overly attached to documenting and commemorating our past - at the expense of making time and space for NOW. Be an example to your kids by making room for new creations.