My wife is an avid gardener. She tends to away from bonsai (most of the time). To quote her words: “I let my husband works on big trees, I stick to the small stuffs like kusamono and anything palm-size.” Here are some of her small stuffs:
She might not call this flowering jasmine a bonsai, but to me it is a bunjin shohin. The fragrance filled our kitchen when she brought it indoors.
This cabbage is a kitchen left-over. After stripping off all the leaves for food, she planted the stem in a cup filled with expanded shale and water. It rooted and grew into a small cabbage ball with curly leaves. Eventually the regrown cabbage will be eaten, and perhaps the stem will be regrown. She has other kitchen left overs, such as potato eye, yam, onion etc., grown into what I called, kitchen-scrap bonsai.
Bonsai Penjing & More 