I had a couple stem broken wine glasses. Use dollar store stemware or repurpose broken stemware. put glass down in plant and place a candle inside, use a citronella to keep bugs away or battery operated of children are around.
Stacked lids, bottle tops and caps. Fun for kids, but would also make great garden art! I'd think the trick for doing this project is to collect as much different color, shape & size of lid/caps as possible before start putting them together.