An image search from Google - Miniature Garden
As a free flow craft activity provide an area with a bucket of soil and a selection of tin lids, pots and dishes.
Add texture and content with gravel, stones, tin foil for ponds, twigs, grass, daisy heads and other small blossom and leaves.
Small logs, sand and pebbles for construction gardens - working quarrys.
A sign post for each Child's name and laminated animals/people for interaction & role play.
If anyone has a photo they would like uploaded please get in touch - firstname.lastname@example.org