Above is an artwork of a cicada shell. It can inspire poetry.
A cicada shell shows what is left behind after a transition. This idea can be applied to many situations for poetry.
For example, a poet could write about a toy a child stops playing with after they get older. Another example might be a car a person trades in after they have children. There are other examples as well.
The basic idea could be to write about something a person leaves behind as they transition from one state in life to another. This notion could be viewed from different perspectives depending on the idea the poet wanted to get across.
Here is an example poem:
the vending machine
day one of the diet