Four things?

Challenge: Weekly Prompts: Weekend Challenge
Topic: What Am I?

This weekend Sue and GC ask:

This weekend the challenge from partner GC and myself is What Am I?  Think of it as a continuation of our WHAT IS IT series, a change of name that offers a little more scope.
Why not publish part of a photograph that will leave your readers wondering what it could be? Alternatively, you could share a piece of writing that leaves us guessing – or, how about poetry and rhyme? 

So here are four things, but what are they?

Here is a link to the bigger picture.

Have a good weekend.

Ken