What common sayings could easily be represented in picture form?

Facebook

Firefly or lightening bug

A circle with a pink-colored ‘E’ inside – ring around the rosie
A block letter ‘1’ with a darkened circle within it – hole in one

Microsoft
A tiny flaccid penis.

A picture of a head over top of a picture of heals. Head over heals.
The number nine on a cloud. On cloud nine.

Is this what you have in mind?

A jellyfish with one really straight and hard tendril amongst many – Horny Jelly : )

Look up the word rebus and you’ll find examples. They used to have books of them for kids to solve. I hope they are still around, but have no idea if they are.

Ditto: rebus books.

Then there’s ‘thinking outside the box’ puzzles.

They both involve finding hidden phrases from visual cues.

This one says hi, i’m Donald Trump!

There used to be a quiz show on UK TV called Catchphrase that was exactly this – a phrase was represented by an image or short sequence and the copntestants had to guess for points and prizes. The host, Roy Walker, was brilliant – the lamest answers would get always get the response from him: ‘it’s good but it’s not the right answer’ which became a catchphrase itself for a while. Lovely. Thanks for reminding me of it :-)