Try to get a box/luggage with a lid. If none, make a wooden lid to keep open and hang post cards from. Then, lay/stand other post cards inside this.Either put by end table or as a decoration on TV stand.
A Dry river bed instead of a traditional sand pit. Large and smaller river rock lining a sand river with tree stumps, ferns and toys. This is a home daycare that has a lot of natural play elements in their backyard play environment.